GLSA-201110-19 : X.Org X Server: Multiple vulnerabilities

This script is Copyright (C) 2011-2015 Tenable Network Security, Inc.

Synopsis :

The remote Gentoo host is missing one or more security-related

Description :

The remote host is affected by the vulnerability described in GLSA-201110-19
(X.Org X Server: Multiple vulnerabilities)

vladz reported the following vulnerabilities in the X.Org X server:
The X.Org X server follows symbolic links when trying to access the
lock file for a X display, showing a predictable behavior depending on
the file type of the link target (CVE-2011-4028).
The X.Org X server lock file mechanism allows for a race condition to
cause the X server to modify the file permissions of an arbitrary file
to 0444 (CVE-2011-4029).

Impact :

A local attacker could exploit these vulnerabilities to disclose
information by making arbitrary files on a system world-readable or gain
information whether a specified file exists on the system and whether it
is a file, directory, or a named pipe.

Workaround :

There is no known workaround at this time.

See also :

Solution :

All X.Org X Server 1.9 users should upgrade to the latest 1.9 version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=x11-base/xorg-server-1.9.5-r1'
All X.Org X Server 1.10 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=x11-base/xorg-server-1.10.4-r1'

Risk factor :

Low / CVSS Base Score : 1.9
CVSS Temporal Score : 1.4
Public Exploit Available : false

Family: Gentoo Local Security Checks

Nessus Plugin ID: 56594 ()

Bugtraq ID:

CVE ID: CVE-2011-4028

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