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OpenSSH Security Advisory: cbc.adv Regarding the "Plaintext Recovery Attack Against SSH" reported as CPNI-957037[1]: The OpenSSH team has been made aware of an attack against the SSH protocol version 2 by researchers at the University of London. Unfortunately, due to the report lacking any detailed technical description of the attack and CPNI's unwillingness to share necessary information, we are...

OpenSSH Security Advisory: cbc.adv Regarding the "Plaintext Recovery Attack Against SSH" reported as CPNI-957037[1]: The OpenSSH team has been made aware of an attack against the SSH protocol version 2 by researchers at the University of London. Unfortunately, due to the report lacking any detailed technical description of the attack and CPNI's unwillingness to share necessary information, we are...

...eems to be quiet regarding this supposed "0-day" openssh vulnerability and I'm wondering if anyone here may have some insight or further information regarding it. We've been monitoring things and the amount of speculative info flying around is incredible. Some claim it's the CPNI-957037 issue, thus affecting <5.2, others are indicating it's the unsafe signal handler issue fixed in 4.4. Granted, Red Hat does ship with a patched 4.3, but we have corrected all issues that we know to have existed with 4.3. And the veracity of the supposed "logs" are sketchy a...

...edging that there is a vulnerability with ALL CBC mode ciphers. The OpenSSH team also suggests a mitigation in which the CTR mode ciphers "may be preferentially selected" first in the ssh[d]_config files: Ciphers aes128-ctr,aes256-ctr,arcfour256,arcfour,aes128-cbc,aes256-cbc http://www.cpni.gov.uk/Docs/Vulnerability_Advisory_SSH.txt https://packetstormsecurity.com/files/72061/Vulnerability_Advisory_SSH.txt.html http://www.cs.washington.edu/homes/yoshi/papers/TISSEC04/ https://homes.cs.washington.edu/~yoshi/papers/TISSEC04/ssh-acmccs.pdf http://isg.rhul.ac.uk/~kp/SandPfinal.pdf https...

...se introduced many new features and made some invasive changes. Changes since OpenSSH 5.1 ========================= Security: * This release changes the default cipher order to prefer the AES CTR modes and the revised "arcfour256" mode to CBC mode ciphers that are susceptible to CPNI-957037 "Plaintext Recovery Attack Against SSH". * This release also adds countermeasures to mitigate CPNI-957037-style attacks against the SSH protocol's use of CBC-mode ciphers. Upon detection of an invalid packet length or Message Authentication Code, ssh/sshd will contin...

...se introduced many new features and made some invasive changes. Changes since OpenSSH 5.1 ========================= Security: * This release changes the default cipher order to prefer the AES CTR modes and the revised "arcfour256" mode to CBC mode ciphers that are susceptible to CPNI-957037 "Plaintext Recovery Attack Against SSH". * This release also adds countermeasures to mitigate CPNI-957037-style attacks against the SSH protocol's use of CBC-mode ciphers. Upon detection of an invalid packet length or Message Authentication Code, ssh/sshd will contin...

...s. Thanks to the many people who contributed to this release. Changes since OpenSSH 5.1 ========================= Security: * This release changes the default cipher order to prefer the AES CTR modes and the revised "arcfour256" mode to CBC mode ciphers that are susceptible to CPNI-957037 "Plaintext Recovery Attack Against SSH". * This release also adds countermeasures to mitigate CPNI-957037-style attacks against the SSH protocol's use of CBC-mode ciphers. Upon detection of an invalid packet length or Message Authentication Code, ssh/sshd will contin...

...his release. > > > Changes since OpenSSH 5.1 > ========================= > > Security: > > * This release changes the default cipher order to prefer the AES CTR > modes and the revised "arcfour256" mode to CBC mode ciphers that are > susceptible to CPNI-957037 "Plaintext Recovery Attack Against SSH". > > * This release also adds countermeasures to mitigate CPNI-957037-style > attacks against the SSH protocol's use of CBC-mode ciphers. Upon > detection of an invalid packet length or Message Authentication > C...

Hi,There is an alleged OpenSSH vulnerability, see http://www.cpni.gov.uk/Products/alerts/3718.aspx.According to this vulnerability an attacker can potentially recover 32 bits of plaintext from an arbitrary block of ciphertext. After having read the vulnerability note in more detail, my understanding is that the 32 bits of plaintext do not come from the exchange b...

I realize the recent ssh exploit rumors appear to be false. However I've not saw any comments on hostgator's "patch" http://67.18.54.2/~davec/ssh_exploit_fix.txt They continue to talk as if they have inside information. Comments?

....libarchive Security Advisory The FreeBSD Project Topic: Errors handling corrupt tar files in libarchive(3) Category: core Module: libarchive Announced: 2007-07-12 Credits: CPNI, CERT-FI, Tim Kientzle, Colin Percival Affects: FreeBSD 5.3 and later. Corrected: 2007-07-12 15:00:44 UTC (RELENG_6, 6.2-STABLE) 2007-07-12 15:01:14 UTC (RELENG_6_2, 6.2-RELEASE-p6) 2007-07-12 15:01:32 UTC (RELENG_6_1, 6.1-RELEASE-p18) 200...

....libarchive Security Advisory The FreeBSD Project Topic: Errors handling corrupt tar files in libarchive(3) Category: core Module: libarchive Announced: 2007-07-12 Credits: CPNI, CERT-FI, Tim Kientzle, Colin Percival Affects: FreeBSD 5.3 and later. Corrected: 2007-07-12 15:00:44 UTC (RELENG_6, 6.2-STABLE) 2007-07-12 15:01:14 UTC (RELENG_6_2, 6.2-RELEASE-p6) 2007-07-12 15:01:32 UTC (RELENG_6_1, 6.1-RELEASE-p18) 200...