CentOS Update for openssh CESA-2013:0519 centos6

Published: 2013-03-12 04:29:37
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:H/Au:N/C:C/I:C/A:C

Summary:
The remote host is missing an update for the 'openssh' Linux Distribution Package(s) announced via the referenced advisory.

Affected Versions:
openssh on CentOS 6

Recommendations:
Please install the updated Linux Distribution Packages.

Technical Details:
OpenSSH is OpenBSD's Secure Shell (SSH) protocol implementation. These Linux Distribution Packages include the core files necessary for the OpenSSH client and server. Due to the way the pam_ssh_agent_auth PAM module was built in Red Hat Enterprise Linux 6, the glibc's error() function was called rather than the intended error() function in pam_ssh_agent_auth to report errors. As these two functions expect different arguments, it was possible for an attacker to cause an application using pam_ssh_agent_auth to crash, disclose portions of its memory or, potentially, execute arbitrary code. (CVE-2012-5536) Note that the pam_ssh_agent_auth module is not used in Red Hat Enterprise Linux 6 by default. This update also fixes the following bugs: * All possible options for the new RequiredAuthentications directive were not documented in the sshd_config man page. This update improves the man page to document all the possible options. (BZ#821641) * When stopping one instance of the SSH daemon (sshd), the sshd init script (/etc/rc.d/init.d/sshd) stopped all sshd processes regardless of the PID of the processes. This update improves the init script so that it only kills processes with the relevant PID. As a result, the init script now works more reliably in a multi-instance environment. (BZ#826720) * Due to a regression, the ssh-copy-id command returned an exit status code of zero even if there was an error in copying the key to a remote host. With this update, a patch has been applied and ssh-copy-id now returns a non-zero exit code if there is an error in copying the SSH certificate to a remote host. (BZ#836650) * When SELinux was disabled on the system, no on-disk policy was installed, a user account was used for a connection, and no '~/.ssh' configuration was present in that user's home directory, the SSH client terminated unexpectedly with a segmentation fault when attempting to connect to another system. A patch has been provided to address this issue and the crashes no longer occur in the described scenario. (BZ#836655) * The 'HOWTO' document /usr/share/doc/openssh-ldap-5.3p1/HOWTO.ldap-keys incorrectly documented the use of the AuthorizedKeysCommand directive. This update corrects the document. (BZ#857760) This update also adds the following enhancements: * When attempting to enable SSH for use with a Common Access Card (CAC), the ssh-agent utility read all the certificates in the card even though only the ID certificate was needed. Consequently, if a user entered their PIN incorrectly, then t ... Description truncated, please see the referenced URL(s) for more information.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2012-5536

References:

http://lists.centos.org/pipermail/centos-announce/2013-March/019458.html

Severity
Medium
CVSS Score
6.2
Published
2013-03-12
Modified
2019-03-15
Category
CentOS Local Security Checks

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