Summary of the issue:
The auth_parse_options function in auth-options.c in sshd in OpenSSH before 5.7 provides debug messages containing
authorized_keys command options, which allows remote authenticated users to obtain potentially sensitive information
by reading these messages, as demonstrated by the shared user account required by Gitolite. NOTE: this can cross
privilege boundaries because a user account may intentionally have no shell or filesystem access, and therefore may
have no supported way to read an authorized_keys file in its own home directory.
OpenSSH before 5.7 is affected.
Attack details…:
According to its banner, the version of OpenSSH installed on the remote
host is older than 5.7:
ssh-2.0-openssh_5.5p1 debian-6+squeeze5
Summary:
The auth_parse_options function in auth-options.c in sshd in OpenSSH before 5.7
provides debug messages containing authorized_keys command options, which allows
remote authenticated users to obtain potentially sensitive information by
reading these messages, as demonstrated by the shared user account required by
Gitolite. NOTE: this can cross privilege boundaries because a user account may
intentionally have no shell or filesystem access, and therefore may have no
supported way to read an authorized_keys file in its own home directory.
OpenSSH before 5.7 is affected;
Solution/Fix: Updates are available.
References: CVE: CVE-2012-0814 (http://www.securityfocus.com/bid/51702, etc…)
Br,
Simone