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

[GLSA]

Gentoo Linux Security Advisory

Title: NX 2.1: User-assisted execution of arbitrary code (GLSA 200710-09)
Severity: normal
Exploitable: remote
Date: October 09, 2007
Bug(s): #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: net-misc/nx
Vulnerable: < 3.0.0
Unaffected: >= 3.0.0
Architectures: All supported architectures

Package: net-misc/nxnode
Vulnerable: < 3.0.0-r3
Unaffected: >= 3.0.0-r3
Architectures: 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: