FreeBSD : Xorg server -- two vulnerabilities in X server lock handling code (8441957c-f9b4-11e0-a78a-bcaec565249c)

This script is Copyright (C) 2011-2013 Tenable Network Security, Inc.

Synopsis :

The remote FreeBSD host is missing a security-related update.

Description :

Matthieu Herrb reports :

It is possible to deduce if a file exists or not by exploiting the way
that Xorg creates its lock files. This is caused by the fact that the
X server is behaving differently if the lock file already exists as a
symbolic link pointing to an existing or non-existing file.

It is possible for a non-root user to set the permissions for all
users on any file or directory to 444, giving unwanted read access or
causing denies of service (by removing execute permission). This is
caused by a race between creating the lock file and setting its access

See also :

Solution :

Update the affected package.

Risk factor :

Low / CVSS Base Score : 1.9

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 56548 ()

Bugtraq ID:

CVE ID: CVE-2011-4028

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