Ubuntu 10.04 LTS / 10.10 / 11.04 / 11.10 : xorg-server vulnerabilities (USN-1232-1)

Ubuntu Security Notice (C) 2011-2016 Canonical, Inc. / NASL script (C) 2011-2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing a security-related patch.

Description :

It was discovered that the X server incorrectly handled certain
malformed input. An authorized attacker could exploit this to cause
the X server to crash, leading to a denial or service, or possibly
execute arbitrary code with root privileges. This issue only affected
Ubuntu 10.04 LTS and 10.10. (CVE-2010-4818)

It was discovered that the X server incorrectly handled certain
malformed input. An authorized attacker could exploit this to cause
the X server to crash, leading to a denial or service, or possibly
read arbitrary data from the X server process. This issue only
affected Ubuntu 10.04 LTS. (CVE-2010-4819)

Vladz discovered that the X server incorrectly handled lock files. A
local attacker could use this flaw to determine if a file existed or
not. (CVE-2011-4028)

Vladz discovered that the X server incorrectly handled setting lock
file permissions. A local attacker could use this flaw to gain read
permissions on arbitrary files and view sensitive information.
(CVE-2011-4029).

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

Solution :

Update the affected xserver-xorg-core package.

Risk factor :

High / CVSS Base Score : 8.5
(CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C)
CVSS Temporal Score : 6.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 56555 ()

Bugtraq ID: 50002

CVE ID: CVE-2010-4818
CVE-2010-4819
CVE-2011-4028
CVE-2011-4029

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