Security Vulnerability in the libxml2 Library May Lead to a Denial of Service (DoS)

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a security vulnerability in the libxml2 library (see libxml2(3)) bundled with Solaris 9 and Solaris 10 (see below for full details)

1. Impact

There is a security vulnerability in the libxml2 library (see libxml2(3)) bundled with Solaris 9 and Solaris 10 which may impact applications making use of this library. The precise impact will vary depending on the application, but this vulnerability may allow a local or remote unprivileged user who provides a specially crafted XML file to cause a denial of service (DoS) to the application which is using the libxml2 library (or potentially to the system as a whole as the application may consume excessive resources).

Additional information regarding this issue is available at:

• CVE-2007-6284 at: CVE-2007-6284 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6284

2. Contributing Factors

These issues can occur in the following releases:

SPARC Platform

• Solaris 9 without patch 114014-18
• Solaris 10 without patch 125731-02

x86 Platform

• Solaris 9 without patch 114015-18
• Solaris 10 without patch 125732-02

Note: Solaris 8 does not include support for libxml2 and is not impacted by this issue.

3. Symptoms

If the described issue is exploited, the application which makes use of the libxml2 library to process the crafted XML file may be unresponsive, possibly consuming all available CPU resources while looping continuously. Commands such as prstat(1M) can be used to determine the utilization of system resources, for example:

    $ prstat -s cpu
    [...]

4. Workaround
Please see Resolution below.


5. Resolution
This issue is addressed in the following releases:

SPARC Platform

• Solaris 9 with patch 114014-18 or later
  
• Solaris 10 with patch 125731-02 or later
  

x86 Platform

• Solaris 9 with patch 114015-18 or later
  
• Solaris 10 with patch 125732-02 or later

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Modification History

11-Feb-2008: Updated Contributing Factors, Relief/Workaround and Resolution sections.  Now Resolved.

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