SUSE SLES11 Security Update : openssh (SUSE-SU-2015:1547-1) (Logjam)

High Nessus Plugin ID 85929


The remote SUSE host is missing one or more security updates.


openssh was updated to fix several security issues and bugs.

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 to address LOGJAM (bsc#932483).

- Hardening patch to fix sftp RCE (bsc#903649).

- CVE-2015-6563: The monitor component in sshd in OpenSSH accepted extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allowed local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.

- CVE-2015-6564: Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH might have allowed local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server for VMWare 11-SP3 :

zypper in -t patch slessp3-openssh-12087=1

SUSE Linux Enterprise Server 11-SP3 :

zypper in -t patch slessp3-openssh-12087=1

To bring your system up-to-date, use 'zypper patch'.

See Also

Plugin Details

Severity: High

ID: 85929

File Name: suse_SU-2015-1547-1.nasl

Version: $Revision: 2.6 $

Type: local

Agent: unix

Published: 2015/09/14

Modified: 2017/12/28

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 8.5

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


Base Score: 3.7

Temporal Score: 3.4

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:openssh, p-cpe:/a:novell:suse_linux:openssh-askpass, p-cpe:/a:novell:suse_linux:openssh-askpass-gnome, cpe:/o:novell:suse_linux:11

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2015/09/09

Reference Information

CVE: CVE-2015-4000, CVE-2015-5352, CVE-2015-5600, CVE-2015-6563, CVE-2015-6564

BID: 74733, 75525

OSVDB: 122331, 124008, 124938, 126030, 126033