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CentOS Update for openssh CESA-2013:0519 centos6

Information

Severity

Severity

Medium

Family

Family

CentOS Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.2

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:H/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

11 years ago

Modified

Modified

5 years ago

Summary

The remote host is missing an update for the 'openssh' package(s) announced via the referenced advisory.

Insight

Insight

OpenSSH is OpenBSD's Secure Shell (SSH) protocol implementation. These 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.

Affected Software

Affected Software

openssh on CentOS 6

Solution

Solution

Please install the updated packages.

Common Vulnerabilities and Exposures (CVE)