drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Pufferüberlauf in chmlib, kchmviewer
Name: |
Pufferüberlauf in chmlib, kchmviewer |
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ID: |
200511-23 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Mo, 28. November 2005, 11:24 |
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Referenzen: |
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3318 |
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Applikationen: |
KchmViewer, MS CHM library |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200511-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: chmlib, KchmViewer: Stack-based buffer overflow Date: November 28, 2005 Bugs: #110557 ID: 200511-23
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Synopsis ========
chmlib and KchmViewer contain a buffer overflow vulnerability which may lead to the execution of arbitrary code.
Background ==========
chmlib is a library for dealing with Microsoft ITSS and CHM format files. KchmViewer is a CHM viewer that includes its own copy of the chmlib library.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-doc/chmlib < 0.37.4 >= 0.37.4 2 app-doc/kchmviewer < 1.1 >= 1.1 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. -------------------------------------------------------------------
Description ===========
Sven Tantau reported about a buffer overflow vulnerability in chmlib. The function "_chm_decompress_block()" does not properly perform boundary checking, resulting in a stack-based buffer overflow.
Impact ======
By convincing a user to open a specially crafted ITSS or CHM file, using KchmViewer or a program makes use of chmlib, a remote attacker could execute arbitrary code with the privileges of the user running the software.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All chmlib users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-doc/chmlib-0.37.4"
All KchmViewer users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-doc/kchmviewer-1.1"
References ==========
[ 1 ] CVE-2005-3318 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3318
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200511-23.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.
License =======
Copyright 2005 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.
http://creativecommons.org/licenses/by-sa/2.0
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