7.2 - RHSA-2017:0641

Problem Description:

An update for openssh is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

* It was discovered that the OpenSSH sshd daemon fetched PAM environment settings before running the login program. In configurations with UseLogin=yes and the pam_env PAM module configured to read user environment settings, a local user could use this flaw to execute arbitrary code as root. (CVE-2015-8325)

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9 Technical Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the OpenSSH server daemon (sshd) will be restarted automatically.

5. Bugs fixed (https://bugzilla.redhat.com/):

1218424 - infinite loop, at 100% cpu in ssh if ^Z is pressed at password prompt 1327547 - ssh-copy-id fails with shells unaware of ~/ 1328012 - CVE-2015-8325 openssh: privilege escalation via user's PAM environment and UseLogin=yes 1341747 - sftp -m doesn't work as advertised 1353359 - 5.3p1-117.el6 breaks gss-group1-sha1- key exchange algorithm for GSSAPIKeyExchange authentication 1353410 - [ssh-copy-id] add "The agent has no identities." in remote ~/.ssh/authorized_keys 1373836 - Remove RC4 cipher and questionable MACs enabled by default from OpenSSH 1397547 - SSH does not use the ibmca crypto hardware