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[ GLSA 200812-06 ] libxml2: Multiple vulnerabilities
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PostPosted: Tue Dec 02, 2008 11:26 pm    Post subject: [ GLSA 200812-06 ] libxml2: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: libxml2: Multiple vulnerabilities (GLSA 200812-06)
Severity: normal
Exploitable: remote
Date: December 02, 2008
Bug(s): #234099, #237806, #239346, #245960
ID: 200812-06

Synopsis

Multiple vulnerabilities in libxml2 might lead to execution of arbitrary code or Denial of Service.

Background

libxml2 is the XML (eXtended Markup Language) C parser and toolkit initially developed for the Gnome project.

Affected Packages

Package: dev-libs/libxml2
Vulnerable: < 2.7.2-r1
Unaffected: >= 2.7.2-r1
Architectures: All supported architectures


Description

Multiple vulnerabilities were reported in libxml2:
  • Andreas Solberg reported that libxml2 does not properly detect recursion during entity expansion in an attribute value (CVE-2008-3281).
  • A heap-based buffer overflow has been reported in the xmlParseAttValueComplex() function in parser.c (CVE-2008-3529).
  • Christian Weiske reported that predefined entity definitions in entities are not properly handled (CVE-2008-4409).
  • Drew Yao of Apple Product Security reported an integer overflow in the xmlBufferResize() function that can lead to an infinite loop (CVE-2008-4225).
  • Drew Yao of Apple Product Security reported an integer overflow in the xmlSAX2Characters() function leading to a memory corruption (CVE-2008-4226).


Impact

A remote attacker could entice a user or automated system to open a specially crafted XML document with an application using libxml2, possibly resulting in the exeution of arbitrary code or a high CPU and memory consumption.

Workaround

There is no known workaround at this time.

Resolution

All libxml2 users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libxml2-2.7.2-r1"


References

CVE-2008-3281
CVE-2008-3529
CVE-2008-4409
CVE-2008-4225
CVE-2008-4226
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