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NX: User-assisted execution of arbitrary code


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200807-07 / nx, nxnode
Release Date July 09, 2008
Latest Revision July 09, 2008: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/nxnode < 3.2.0-r3 >= 3.2.0-r3 All supported architectures
net-misc/nx < 3.2.0-r2 >= 3.2.0-r2 All supported architectures

Related bugreports: #230147


NX uses code from the X11 server which is prone to multiple vulnerabilities.

2.  Impact Information


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.


Multiple integer overflow and buffer overflow vulnerabilities have been discovered in the X.Org X server as shipped by NX and NX Node (GLSA 200806-07).


A remote attacker could exploit these vulnerabilities via unspecified vectors, leading to the execution of arbitrary code with the privileges of the user on the machine running the NX server.

3.  Resolution Information


There is no known workaround at this time.


All NX Node users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/nxnode-3.2.0-r3"

All NX users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/nx-3.2.0-r2"

4.  References


Page updated July 09, 2008

Summary: This is a Gentoo Linux Security Advisory

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