GLSA 200710-09: NX 2.1: User-assisted execution of arbitrary code

http://security.gentoo.org/

Severity:	normal
Title:	NX 2.1: User-assisted execution of arbitrary code
Date:	10/09/2007
Bugs:	#192712
ID:	200710-09

Synopsis

NX in the 2.1 series uses XFree86 4.3 code which is prone to an integer overflow vulnerability.

Background

NoMachine's NX establishes remote connections to X11 desktops over small bandwidth links. NX and NX Node are the compression core libraries, whereas NX is used by FreeNX and NX Node by the binary-only NX servers.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/nx	< 3.0.0	>= 3.0.0	All supported architectures
net-misc/nxnode	< 3.0.0-r3	>= 3.0.0-r3	All supported architectures

Description

Chris Evans reported an integer overflow within the FreeType PCF font file parser (CVE-2006-1861). NX and NX Node are vulnerable to this due to shipping XFree86 4.3.0, which includes the vulnerable FreeType code.

Impact

A remote attacker could exploit these integer overflows by enticing a user to load a specially crafted PCF font file which might lead to the execution of arbitrary code with the privileges of the user on the machine running the NX server.

Workaround

There is no known workaround at this time.

Resolution

All NX users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/nx-3.0.0"

All NX Node users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/nxnode-3.0.0-r3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200710-09.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.