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

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• - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200710-09
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  Severity: Normal
     Title: NX 2.1: User-assisted execution of arbitrary code
      Date: October 09, 2007
      Bugs: #192712
        ID: 200710-09

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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
    -------------------------------------------------------------------
  1  net-misc/nx           < 3.0.0                            >= 3.0.0
  2  net-misc/nxnode     < 3.0.0-r3                        >= 3.0.0-r3
    -------------------------------------------------------------------
     2 affected packages on all of their 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.

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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:

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

References

  [ 1 ] CVE-2006-1861
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-1861   [ 2 ] GLSA 200607-02
        http://www.gentoo.org/security/en/glsa/glsa-200607-02.xml

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 http://bugs.gentoo.org.

Can we help you?

In addition to our free technical library, Pantek provides professional IT services to companies who utilize Open Source software: Learn more about Pantek's Technical Support offerings Place an order for 24/7/365 Technical Support here Learn more about Pantek, who we are, and what we do Chat with a Live Operator Related securityfocus.com Links bugtraq certification focus-bsd focus-ids focus-ih focus-linux focus-ms focus-sun focus-unix-other focus-virus forensics incidents libnet linux-secnews ms-secnews pen-test secpapers secprog sectools secureshell security-basics securityjobs sf-news vuln-dev webappsec Request more information about Pantek

License

Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

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