bugzilla-daemon at bugzilla.mindrot.org
2019-May-15 14:23 UTC
[Bug 3010] New: sshd_config ListenAddress: Netmask is misinterpreted as Port
https://bugzilla.mindrot.org/show_bug.cgi?id=3010
Bug ID: 3010
Summary: sshd_config ListenAddress: Netmask is misinterpreted
as Port
Product: Portable OpenSSH
Version: 7.6p1
Hardware: Other
OS: Linux
Status: NEW
Severity: enhancement
Priority: P5
Component: sshd
Assignee: unassigned-bugs at mindrot.org
Reporter: kurt at easygo.at
Seen on Ubuntu 18.04 (openssh-server, 1:7.6p1-4ubuntu0.2, amd64)
If an IPv4 ListenAddress is configured with netmask suffix (eg.
10.0.0.1/24) the netmask part is used as listening port.
```
$ cat /tmp/sshd_test_conf
ListenAddress 10.0.0.1/24
$ /usr/sbin/sshd -d -f /tmp/sshd_test_conf
debug1: sshd version OpenSSH_7.6, OpenSSL 1.0.2n 7 Dec 2017
debug1: private host key #0: ssh-rsa SHA256:...
debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:...
debug1: private host key #2: ssh-ed25519 SHA256:...
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-d'
debug1: rexec_argv[2]='-f'
debug1: rexec_argv[3]='/tmp/sshd_test_conf'
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 24 on 10.0.0.1.
Server listening on 10.0.0.1 port 24.
```
For sure, this configuration is wrong, in this case it should be
ignored. Starting the service on a port wich was (wrongly) meant as
netmask seems to be wrong.
--
You are receiving this mail because:
You are watching the assignee of the bug.
bugzilla-daemon at bugzilla.mindrot.org
2019-May-15 15:15 UTC
[Bug 3010] sshd_config ListenAddress: Netmask is misinterpreted as Port
https://bugzilla.mindrot.org/show_bug.cgi?id=3010
Jakub Jelen <jjelen at redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |DUPLICATE
CC| |jjelen at redhat.com
Status|NEW |RESOLVED
--- Comment #1 from Jakub Jelen <jjelen at redhat.com> ---
*** This bug has been marked as a duplicate of bug 2335 ***
--
You are receiving this mail because:
You are watching the assignee of the bug.
bugzilla-daemon at mindrot.org
2021-Apr-23 05:04 UTC
[Bug 3010] sshd_config ListenAddress: Netmask is misinterpreted as Port
https://bugzilla.mindrot.org/show_bug.cgi?id=3010
Damien Miller <djm at mindrot.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
--- Comment #2 from Damien Miller <djm at mindrot.org> ---
closing resolved bugs as of 8.6p1 release
--
You are receiving this mail because:
You are watching the assignee of the bug.