SUSE SLED12 / SLES12 Security Update : polkit (SUSE-SU-2015:1838-1)

This script is Copyright (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

polkit was updated to the 0.113 release, fixing security issues and
bugs.

Security issues fixed :

- Fixes CVE-2015-4625, a local privilege escalation due to
predictable authentication session cookie values. Thanks
to Tavis Ormandy, Google Project Zero for reporting this
issue. For the future, authentication agents are
encouraged to use PolkitAgentSession instead of using
the D-Bus agent response API directly. (bsc#935119)

- Fixes CVE-2015-3256, various memory corruption
vulnerabilities in use of the JavaScript interpreter,
possibly leading to local privilege escalation.
(bsc#943816)

- Fixes CVE-2015-3255, a memory corruption vulnerability
in handling duplicate action IDs, possibly leading to
local privilege escalation. Thanks to Laurent Bigonville
for reporting this issue. (bsc#939246)

- Fixes CVE-2015-3218, which allowed any local user to
crash polkitd. Thanks to Tavis Ormandy, Google Project
Zero, for reporting this issue. (bsc#933922)

Other issues fixed :

- On systemd-213 and later, the 'active' state is shared
across all sessions of an user, instead of being tracked
separately.

- pkexec, when not given a program to execute, runs the
users shell by default.

- Fixed shutdown problems on powerpc64le (bsc#950114)

- polkit had a memory leak (bsc#912889)

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.

See also :

https://bugzilla.suse.com/912889
https://bugzilla.suse.com/933922
https://bugzilla.suse.com/935119
https://bugzilla.suse.com/939246
https://bugzilla.suse.com/943816
https://bugzilla.suse.com/950114
https://www.suse.com/security/cve/CVE-2015-3218.html
https://www.suse.com/security/cve/CVE-2015-3255.html
https://www.suse.com/security/cve/CVE-2015-3256.html
https://www.suse.com/security/cve/CVE-2015-4625.html
http://www.nessus.org/u?e9a03389

Solution :

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

SUSE Linux Enterprise Workstation Extension 12 :

zypper in -t patch SUSE-SLE-WE-12-2015-759=1

SUSE Linux Enterprise Software Development Kit 12 :

zypper in -t patch SUSE-SLE-SDK-12-2015-759=1

SUSE Linux Enterprise Server 12 :

zypper in -t patch SUSE-SLE-SERVER-12-2015-759=1

SUSE Linux Enterprise Desktop 12 :

zypper in -t patch SUSE-SLE-DESKTOP-12-2015-759=1

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

Risk factor :

Medium / CVSS Base Score : 4.6
(CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 3.6
(CVSS2#E:POC/RL:OF/RC:ND)
Public Exploit Available : true

Family: SuSE Local Security Checks

Nessus Plugin ID: 86649 ()

Bugtraq ID: 75267

CVE ID: CVE-2015-3218
CVE-2015-3255
CVE-2015-3256
CVE-2015-4625

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