Ubuntu 8.04 LTS / 10.04 LTS / 10.10 / 11.04 / 11.10 : libxml2 vulnerabilities (USN-1334-1)

Ubuntu Security Notice (C) 2012-2013 Canonical, Inc. / NASL script (C) 2012-2013 Tenable Network Security, Inc.


Synopsis :

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

Description :

It was discovered that libxml2 contained an off by one error. If a
user or application linked against libxml2 were tricked into opening a
specially crafted XML file, an attacker could cause the application to
crash or possibly execute arbitrary code with the privileges of the
user invoking the program. (CVE-2011-0216)

It was discovered that libxml2 is vulnerable to double-free conditions
when parsing certain XML documents. This could allow a remote attacker
to cause a denial of service. (CVE-2011-2821, CVE-2011-2834)

It was discovered that libxml2 did not properly detect end of file
when parsing certain XML documents. An attacker could exploit this to
crash applications linked against libxml2. (CVE-2011-3905)

It was discovered that libxml2 did not properly decode entity
references with long names. If a user or application linked against
libxml2 were tricked into opening a specially crafted XML file, an
attacker could cause the application to crash or possibly execute
arbitrary code with the privileges of the user invoking the program.
(CVE-2011-3919).

Solution :

Update the affected libxml2 package.

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.9
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 57615 ()

Bugtraq ID: 48832
49279
49658
51084
51300

CVE ID: CVE-2011-0216
CVE-2011-2821
CVE-2011-2834
CVE-2011-3905
CVE-2011-3919