Daniel Schröter
2002-Jul-04 19:16 UTC
With bounds checking patch for gcc-3.1 problems if using AES
Hello developers,
some informations before I come to the problem:
At work we're using Open-SSH 3.4p1 under Solaris 8. I compiled the
Open-SSH by myself with gcc-3.1. In the gcc is the bounds checking patch
included
(http://web.inter.nl.net/hcc/Haj.Ten.Brugge/bounds-checking-gcc-3.1-1.01.patch.bz2).
With this patch I compiled:
- prngd 0.9.25
- zlib 1.1.4
- Open-SSL 0.9.6d
Everything works fine.... :-)
....if I doesn't use AES :-(
Here a list:
aes128-cbc --> Connection closed by 127.0.0.1
3des-cbc --> Okay
blowfish-cbc --> Okay
cast128-cbc --> Okay
arcfour --> Okay
aes192-cbc --> Connection closed by 127.0.0.1
aes256-cbc --> Connection closed by 127.0.0.1
If I doesn't use a gcc with the bounds checking patch the problem
doesn't occur. If I set:
$ export GCC_BOUNDS_OPTS="-no-message -no-statistics -never-fatal"
and switch off Bounds Checking it works also with AES.
The problem is on both sites (client and server). I give you some
debuging output. I switched off on the client site the bounds checking
and use 3des-cbc for encrytion:
[client-site] $ export GCC_BOUNDS_OPTS="-no-message -no-statistics
-never-fatal"
[client-site] $ ssh -vvv -c 3des-cbc localhost
OpenSSH_3.4p1, SSH protocols 1.5/2.0, OpenSSL 0x0090604f
debug1: Reading configuration data /opt/BBKEssh/etc/ssh_config
debug3: Seeding PRNG from /opt/BBKEssh/libexec/ssh-rand-helper
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: ssh_connect: needpriv 0
debug1: Connecting to localhost [::1] port 22.
ssh: connect to address ::1 port 22: Network is unreachable
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/test/.ssh/identity type -1
debug1: identity file /home/test/.ssh/id_rsa type -1
debug1: identity file /home/test/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.4p1
debug1: match: OpenSSH_3.4p1 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.4p1
debug3: RNG is ready, skipping seeding
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: 3des-cbc
debug2: kex_parse_kexinit: 3des-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: server->client 3des-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server 3des-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: dh_gen_key: priv key bits set: 190/384
debug1: bits set: 2006/4095
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/test/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 5
debug1: Host 'localhost' is known and matches the RSA host key.
debug1: Found key in /home/test/.ssh/known_hosts:5
debug1: bits set: 2088/4095
debug1: ssh_rsa_verify: signature correct
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: done: ssh_kex2.
debug1: send SSH2_MSG_SERVICE_REQUEST
debug1: service_accept: ssh-userauth
debug1: got SSH2_MSG_SERVICE_ACCEPT
debug1: authentications that can continue:
publickey,password,keyboard-interactive
debug3: start over, passed a different list
publickey,password,keyboard-interactive
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: next auth method to try is publickey
debug1: try privkey: /home/test/.ssh/identity
debug3: no such identity: /home/test/.ssh/identity
debug1: try privkey: /home/test/.ssh/id_rsa
debug3: no such identity: /home/test/.ssh/id_rsa
debug1: try pubkey: /home/test/.ssh/id_dsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: input_userauth_pk_ok: pkalg ssh-dss blen 433 lastkey 1bad20 hint 2
debug2: input_userauth_pk_ok: fp
20:18:ad:14:34:f4:db:be:04:f3:b0:dd:19:80:26:1b
debug3: sign_and_send_pubkey
debug3: no such identity: /home/test/.ssh/id_dsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: next auth method to try is keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug1: authentications that can continue:
publickey,password,keyboard-interactive
debug3: userauth_kbdint: disable: no info_req_seen
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred:
debug3: authmethod_is_enabled password
debug1: next auth method to try is password
^C
[server-site] # export GCC_BOUNDS_OPTS="-no-message -no-statistics"
[server-site]# /opt/BBKEssh/sbin/sshd -f /opt/BBKEssh/etc/sshd_config -ddd
debug3: Seeding PRNG from /opt/BBKEssh/libexec/ssh-rand-helper
debug1: sshd version OpenSSH_3.4p1
debug1: private host key: #0 type 0 RSA1
debug3: Not a RSA1 key file /opt/BBKEssh/etc/ssh_host_rsa_key.
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug3: Not a RSA1 key file /opt/BBKEssh/etc/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
Generating 768 bit RSA key.
RSA key generation complete.
debug1: Server will not fork when running in debugging mode.
Connection from 127.0.0.1 port 33098
debug1: Client protocol version 2.0; client software version OpenSSH_3.4p1
debug1: match: OpenSSH_3.4p1 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-1.99-OpenSSH_3.4p1
debug3: privsep user:group 101:100
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug2: Network child is on pid 3586
debug3: preauth child monitor started
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: 3des-cbc
debug2: kex_parse_kexinit: 3des-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: client->server 3des-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: server->client 3des-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug3: mm_request_send entering: type 0
debug3: mm_choose_dh: waiting for MONITOR_ANS_MODULI
debug3: mm_request_receive_expect entering: type 1
debug3: mm_request_receive entering
debug3: monitor_read: checking request 0
debug3: mm_answer_moduli: got parameters: 1024 4096 8192
debug3: mm_request_send entering: type 1
debug3: mm_choose_dh: remaining 0
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug2: monitor_read: 0 used once, disabling now
debug3: mm_request_receive entering
debug1: dh_gen_key: priv key bits set: 201/384
debug1: bits set: 2088/4095
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug1: bits set: 2006/4095
debug3: mm_key_sign entering
debug3: mm_request_send entering: type 4
debug3: monitor_read: checking request 4
debug3: mm_answer_sign
debug3: mm_answer_sign: signature 1ea800(143)
debug3: mm_request_send entering: type 5
debug2: monitor_read: 4 used once, disabling now
debug3: mm_request_receive entering
debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN
debug3: mm_request_receive_expect entering: type 5
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user test service ssh-connection method none
debug1: attempt 0 failures 0
debug3: mm_getpwnamallow entering
debug3: mm_request_send entering: type 6
debug3: monitor_read: checking request 6
debug3: mm_answer_pwnamallow
debug3: allowed_user: today 11871 sp_expire -1 sp_lstchg 11864 sp_max -1
debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
debug3: mm_request_send entering: type 7
debug2: monitor_read: 6 used once, disabling now
debug3: mm_request_receive entering
debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM
debug3: mm_request_receive_expect entering: type 7
debug3: mm_request_receive entering
debug2: input_userauth_request: setting up authctxt for test
debug3: mm_inform_authserv entering
debug3: mm_request_send entering: type 3
debug3: monitor_read: checking request 3
debug3: mm_answer_authserv: service=ssh-connection, styledebug2: monitor_read: 3
used once, disabling now
debug3: mm_request_receive entering
debug2: input_userauth_request: try method none
debug3: mm_auth_password entering
debug3: mm_request_send entering: type 10
debug3: monitor_read: checking request 10
debug3: mm_answer_authpassword: sending result 0
debug3: mm_request_send entering: type 11
Failed none for test from 127.0.0.1 port 33098 ssh2
debug3: mm_request_receive entering
debug3: mm_auth_password: waiting for MONITOR_ANS_AUTHPASSWORD
debug3: mm_request_receive_expect entering: type 11
debug3: mm_request_receive entering
debug3: mm_auth_password: user not authenticated
Failed none for test from 127.0.0.1 port 33098 ssh2
debug1: userauth-request for user test service ssh-connection method
publickey
debug1: attempt 1 failures 1
debug2: input_userauth_request: try method publickey
debug1: test whether pkalg/pkblob are acceptable
debug3: mm_key_allowed entering
debug3: mm_request_send entering: type 20
debug3: monitor_read: checking request 20
debug3: mm_answer_keyallowed entering
debug3: mm_answer_keyallowed: key_from_blob: 1da260
debug1: temporarily_use_uid: 100/1 (e=0)
debug1: trying public key file /home/test/.ssh/authorized_keys
debug3: secure_filename: checking '/home/test/.ssh'
debug3: secure_filename: checking '/home/test'
debug3: secure_filename: terminating check at '/home/test'
debug1: matching key found: file /home/test/.ssh/authorized_keys, line 1
Found matching DSA key: 20:18:ad:14:34:f4:db:be:04:f3:b0:dd:19:80:26:1b
debug1: restore_uid
debug3: mm_answer_keyallowed: key 1da260 is allowed
debug3: mm_request_send entering: type 21
debug3: mm_request_receive entering
debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED
debug3: mm_request_receive_expect entering: type 21
debug3: mm_request_receive entering
debug2: userauth_pubkey: authenticated 0 pkalg ssh-dss
Postponed publickey for test from 127.0.0.1 port 33098 ssh2
debug1: userauth-request for user test service ssh-connection method
keyboard-interactive
debug1: attempt 2 failures 1
debug2: input_userauth_request: try method keyboard-interactive
debug1: keyboard-interactive devs
debug1: auth2_challenge: user=test devsdebug1: kbdint_alloc: devices ''
debug2: auth2_challenge_start: devices
Failed keyboard-interactive for test from 127.0.0.1 port 33098 ssh2
---------------------
Now with aes-128:
[client-site] $ export GCC_BOUNDS_OPTS="-no-message -no-statistics
-never-fatal"
[client-site] $ ssh -vvv -c aes128-cbc localhost
OpenSSH_3.4p1, SSH protocols 1.5/2.0, OpenSSL 0x0090604f
debug1: Reading configuration data /opt/BBKEssh/etc/ssh_config
debug3: Seeding PRNG from /opt/BBKEssh/libexec/ssh-rand-helper
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: ssh_connect: needpriv 0
debug1: Connecting to localhost [::1] port 22.
ssh: connect to address ::1 port 22: Network is unreachable
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/test/.ssh/identity type -1
debug1: identity file /home/test/.ssh/id_rsa type -1
debug1: identity file /home/test/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.4p1
debug1: match: OpenSSH_3.4p1 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.4p1
debug3: RNG is ready, skipping seeding
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc
debug2: kex_parse_kexinit: aes128-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: dh_gen_key: priv key bits set: 135/256
debug1: bits set: 1582/3191
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
Connection closed by 127.0.0.1
debug1: Calling cleanup 0x6a5a8(0x0)
[server-site] # export GCC_BOUNDS_OPTS="-no-message -no-statistics"
[server-site]# /opt/BBKEssh/sbin/sshd -f /opt/BBKEssh/etc/sshd_config -ddd
debug3: Seeding PRNG from /opt/BBKEssh/libexec/ssh-rand-helper
debug1: sshd version OpenSSH_3.4p1
debug1: private host key: #0 type 0 RSA1
debug3: Not a RSA1 key file /opt/BBKEssh/etc/ssh_host_rsa_key.
debug1: read PEM private key done: type RSA
debug1: private host key: #1 type 1 RSA
debug3: Not a RSA1 key file /opt/BBKEssh/etc/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #2 type 2 DSA
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
Generating 768 bit RSA key.
RSA key generation complete.
debug1: Server will not fork when running in debugging mode.
Connection from 127.0.0.1 port 33100
debug1: Client protocol version 2.0; client software version OpenSSH_3.4p1
debug1: match: OpenSSH_3.4p1 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-1.99-OpenSSH_3.4p1
debug3: privsep user:group 101:100
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug2: Network child is on pid 3623
debug3: preauth child monitor started
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc
at lysator.liu.se
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc
debug2: kex_parse_kexinit: aes128-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug3: mm_request_send entering: type 0
debug3: mm_choose_dh: waiting for MONITOR_ANS_MODULI
debug3: mm_request_receive_expect entering: type 1
debug3: mm_request_receive entering
debug3: monitor_read: checking request 0
debug3: mm_answer_moduli: got parameters: 1024 2048 8192
debug3: mm_request_send entering: type 1
debug3: mm_choose_dh: remaining 0
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug2: monitor_read: 0 used once, disabling now
debug3: mm_request_receive entering
debug1: dh_gen_key: priv key bits set: 135/256
debug1: bits set: 1564/3191
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug1: bits set: 1582/3191
debug3: mm_key_sign entering
debug3: mm_request_send entering: type 4
debug3: monitor_read: checking request 4
debug3: mm_answer_sign
debug3: mm_answer_sign: signature 1ea800(143)
debug3: mm_request_send entering: type 5
debug2: monitor_read: 4 used once, disabling now
debug3: mm_request_receive entering
debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN
debug3: mm_request_receive_expect entering: type 5
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug1: kex_derive_keys
debug1: newkeys: mode 1
<unknown>:0:Bounds error: in memcpy with 0x1a5a38 and 0x1a5a30 for 16,
source and destination objects overlap.
<unknown>:0: Pointer value: 0x1a5a38
<unknown>:0: Object `send_context':
<unknown>:0: Address in memory: 0x1a5a20 .. 0x1a6a9f
<unknown>:0: Size: 4224 bytes
<unknown>:0: Element size: 1 bytes
<unknown>:0: Number of elements: 4224
<unknown>:0: Created at: packet.c, line 87
<unknown>:0: Storage class: static
debug1: Calling cleanup 0x82b04(0x0)
-------------------
If I use aes to connect to an "normal" Open-SSH server I get the same
error (only on client site).
One more output with bounds checking and connection to a Mandrake 8.2
System with Open-SSH 3.1p1:
[client-site] $ export GCC_BOUNDS_OPTS="-no-message -no-statistics"
[client-site] $ ssh -vvv -c aes128-cbc 172.23.66.44
OpenSSH_3.4p1, SSH protocols 1.5/2.0, OpenSSL 0x0090604f
debug1: Reading configuration data /opt/BBKEssh/etc/ssh_config
debug3: Seeding PRNG from /opt/BBKEssh/libexec/ssh-rand-helper
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: ssh_connect: needpriv 0
debug1: Connecting to 172.23.66.44 [172.23.66.44] port 22.
debug1: Connection established.
debug1: identity file /home/test/.ssh/identity type -1
debug1: identity file /home/test/.ssh/id_rsa type -1
debug1: identity file /home/test/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.1p1
debug1: match: OpenSSH_3.1p1 pat OpenSSH_2.*,OpenSSH_3.0*,OpenSSH_3.1*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.4p1
debug3: RNG is ready, skipping seeding
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc
debug2: kex_parse_kexinit: aes128-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit: none
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit:
diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit:
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at
openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: dh_gen_key: priv key bits set: 132/256
debug1: bits set: 1589/3191
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/test/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 4
debug1: Host '172.23.66.44' is known and matches the RSA host key.
debug1: Found key in /home/test/.ssh/known_hosts:4
debug1: bits set: 1597/3191
debug1: ssh_rsa_verify: signature correct
debug1: kex_derive_keys
debug1: newkeys: mode 1
<unknown>:0:Bounds error: in memcpy with 0x18b978 and 0x18b970 for 16,
source and destination objects overlap.
<unknown>:0: Pointer value: 0x18b978
<unknown>:0: Object `send_context':
<unknown>:0: Address in memory: 0x18b960 .. 0x18c9df
<unknown>:0: Size: 4224 bytes
<unknown>:0: Element size: 1 bytes
<unknown>:0: Number of elements: 4224
<unknown>:0: Created at: packet.c, line 87
<unknown>:0: Storage class: static
Okay the problem is in the line 87 in the packet.c file. But it is still
"Created at".
So I tried to debug it. I installed GDB/DDD and read documentations.....
I recompiled openssh with debuging information and without optimization
(the problem still exists):
$ export CC=/buba/gcc/bin/gcc CFLAGS="-g -fbounds-checking
-I/buba/zlib/include" SYSLIBS="-lsocket -lnsl"
LDFLAGS="-fbounds-checking"
$ ./configure --prefix=/opt/BBKEssh --with-zlib=/buba/zlib/lib
--without-rsh --disable-suid-ssh
--with-prngd-socket=/var/spool/prngd/pool --without-pam
--with-ssl-dir=/opt/BBKEssh
I debuged it to line monitor.c:480. If I say "next" to line:
mm_request_send(socket, MONITOR_ANS_SIGN, m);
The function doesn't end :-(
If I use "continue" on an earlier breakpoint I get the same bounds
checking error.
Can somebody help me? Is there a bug in the bounds checking patch or in
Open-SSH? I'm no C- and GDB-expert. I'm very happy to come to this
point. Just mail if you need additional information or I should try out
something.
Thanks in advance!
Bye
Daniel
ps: I'm not subscribed. Please CC me.
Gert Doering
2002-Jul-09 17:31 UTC
With bounds checking patch for gcc-3.1 problems if using AES
Hi, On Tue, Jul 09, 2002 at 07:07:48PM +0000, Daniel Schr?ter wrote:> The line 105 in file openssl-0.9.6d/crypto/evp/evp_enc.c is (maybe) the > problem.: > > memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx)); > > So I take an update to > ftp://ftp.openssl.org/snapshot/openssl-SNAP-20020707.tar.gz > and it works fine. Also the Beta2 from openssl-0.9.7 works fine.Thanks for pointing that out. It might explain the problems I have with ssh -2 on FreeBSD 2.2.x - everything core dumps as soon as it hits a DSA or RSA2 key. Possibly the memcpy in 2.2 works "the other way round" as compared to 3.x and 4.x, and thus it bombs there. I will try that approach as soon as 0.9.7 is officially released... gert -- USENET is *not* the non-clickable part of WWW! //www.muc.de/~gert/ Gert Doering - Munich, Germany gert at greenie.muc.de fax: +49-89-35655025 gert.doering at physik.tu-muenchen.de
Carson Gaspar
2002-Jul-09 17:54 UTC
With bounds checking patch for gcc-3.1 problems if using AES
--On Tuesday, July 09, 2002 7:31 PM +0200 Gert Doering <gert at greenie.muc.de> wrote:> Thanks for pointing that out. It might explain the problems I have > with ssh -2 on FreeBSD 2.2.x - everything core dumps as soon as it > hits a DSA or RSA2 key. Possibly the memcpy in 2.2 works "the other way > round" as compared to 3.x and 4.x, and thus it bombs there.Try doing a s/memcpy/memmove/ on the appropriate source line. memove() is guaranteed to do overlapping copies correctly. memcpy() is not. bcopy() usually works - the BSD ones do, but at least some sysv versions do not. UNIX98 bcopy() does handle overlapping ranges. -- Carson
Daniel Schröter
2002-Jul-09 19:07 UTC
With bounds checking patch for gcc-3.1 problems if using AES
Hello developers,
Daniel Schr?ter wrote:
> debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
> debug1: kex_derive_keys
> debug1: newkeys: mode 1
> <unknown>:0:Bounds error: in memcpy with 0x1a5a38 and 0x1a5a30 for
16,
> source and destination objects overlap.
> <unknown>:0: Pointer value: 0x1a5a38
> <unknown>:0: Object `send_context':
> <unknown>:0: Address in memory: 0x1a5a20 .. 0x1a6a9f
> <unknown>:0: Size: 4224 bytes
> <unknown>:0: Element size: 1 bytes
> <unknown>:0: Number of elements: 4224
> <unknown>:0: Created at: packet.c, line 87
> <unknown>:0: Storage class: static
> debug1: Calling cleanup 0x82b04(0x0)
like I said, I'm not the coding-expert, but I have some additional
informations and a solution. I compiled OpenSSL with the CFLAG "-g"
and
now I get the file and linenumber where the problem occured:
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug1: kex_derive_keys
debug1: newkeys: mode 1
evp_enc.c:105:Bounds error: in memcpy with 0x2bfc40 and 0x2bfc38 for 16,
source and destination objects overlap.
evp_enc.c:105: Pointer value: 0x2bfc40
evp_enc.c:105: Object `send_context':
evp_enc.c:105: Address in memory: 0x2bfc28 .. 0x2c0ca7
evp_enc.c:105: Size: 4224 bytes
evp_enc.c:105: Element size: 1 bytes
evp_enc.c:105: Number of elements: 4224
evp_enc.c:105: Created at: packet.c, line 87
evp_enc.c:105: Storage class: static
debug1: Calling cleanup 0x91178(0x0)
The line 105 in file openssl-0.9.6d/crypto/evp/evp_enc.c is (maybe) the
problem.:
memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
So I take an update to
ftp://ftp.openssl.org/snapshot/openssl-SNAP-20020707.tar.gz
and it works fine. Also the Beta2 from openssl-0.9.7 works fine.
Sorry for the wrong mailingliste I have taken and that the bug is
already fixed.
Bye
--
======================================================== PGP keyID: 9EA3FF2C
$ gpg --keyserver wwwkeys.de.pgp.net --recv-key 9EA3FF2C
=========================================================
Markus Friedl
2002-Jul-12 10:43 UTC
With bounds checking patch for gcc-3.1 problems if using AES
did anyone check this? On Wed, Jul 10, 2002 at 05:35:35PM +0200, Markus Friedl wrote:> can you try something like this: > > folly% cvs diff -u cipher.c > Index: cipher.c > ==================================================================> RCS file: /cvs/src/usr.bin/ssh/cipher.c,v > retrieving revision 1.60 > diff -u -r1.60 cipher.c > --- cipher.c 23 Jun 2002 03:26:52 -0000 1.60 > +++ cipher.c 10 Jul 2002 15:36:29 -0000 > @@ -525,7 +525,7 @@ > rijndal_cbc.cleanup = ssh_rijndael_cleanup; > rijndal_cbc.do_cipher = ssh_rijndael_cbc; > rijndal_cbc.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | > - EVP_CIPH_ALWAYS_CALL_INIT; > + EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CUSTOM_IV; > return (&rijndal_cbc); > } > #endif > [1] > > _______________________________________________ > openssh-unix-dev at mindrot.org mailing list > http://www.mindrot.org/mailman/listinfo/openssh-unix-dev
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