Security update for openssh

Announcement ID: SUSE-SU-2015:1840-1
Rating: moderate
References:
Cross-References:
CVSS scores:
  • CVE-2015-4000 ( NVD ): 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Products:
  • SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2

An update that solves three vulnerabilities and has four security fixes can now be installed.

Description:

openssh was updated to fix four security issues.

These security issues were fixed: - CVE-2015-5352: The x11_open_helper function in channels.c in ssh in OpenSSH when ForwardX11Trusted mode is not used, lacked a check of the refusal deadline for X connections, which made it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window (bsc#936695). - CVE-2015-5600: The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH did not properly restrict the processing of keyboard-interactive devices within a single connection, which made it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list (bsc#938746). - CVE-2015-4000: Removed and disabled weak DH groups (bsc#932483). - Hardening patch to fix sftp RCE (bsc#903649).

These non-security issues were fixed: - bsc#914309: sshd inherits oom_adj -17 on SIGHUP causing DoS potential for oom_killer. - bsc#673532: limits.conf fsize change in SLES10SP3 causing problems to WebSphere mqm user.

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2
    zypper in -t patch slessp2-openssh-12168=1

Package List:

  • SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2 (s390x x86_64 i586)
    • openssh-5.1p1-41.69.1
    • openssh-askpass-gnome-5.1p1-41.69.4
    • openssh-askpass-5.1p1-41.69.1

References: