48298 : libpng pngread.c png_push_read_zTXt() Function Off-By-One
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
3	603	over 4 years ago	5 months ago	4 times	100%

Timeline

Disclosure Date
2008-08-06

Description

libpng contains a flaw in the 'png_push_read_zTXt()' function that may allow a remote denial of service. The issue is due to an off-by-one error within the 'png_push_read_zTXt()' function in pngpread.c. With a specially crafted PNG file containing malformed zTXt chunks, a context-dependent attacker can cause the program to crash.

Classification

Location: Local / Remote, Context Dependent
Attack Type: Denial of Service
Impact: Loss of Availability
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

It has been reported that this issue has been fixed. Upgrade to version 1.2.32, 1.4.0beta34, or higher, to address this vulnerability.

Products

libpng	libpng	1.2.30beta04
		1.2.31

References

CVE ID: 2008-3964 (see also: NVD)
Secunia Advisory ID: 31781 33137 34106 35302 35386
SCIP VulDB ID: 3858
Vendor Specific News/Changelog Entry: http://sourceforge.net/project/shownotes.php?release_id=624518
http://sourceforge.net/tracker/index.php?func=detail&aid=2095669&group_id=5624&atid=105624
https://lists.ubuntu.com/archives/ubuntu-security-announce/2009-March/000855.html
Other Advisory URL: http://sunsolve.sun.com/search/document.do?assetkey=1-66-259989-1
http://support.avaya.com/elmodocs2/security/ASA-2009-208.htm
http://www.gentoo.org/security/en/glsa/glsa-200812-15.xml
http://www.openwall.com/lists/oss-security/2008/09/09/3
http://www.openwall.com/lists/oss-security/2008/09/09/8
Vendor URL: http://www.libpng.org/pub/png/libpng.html

Credit

Harald van Dijk

CVSSv2 Score

CVSSv2 Base Score = 4.3
Source: nvd.nist.gov | Generated: 2008-09-11 | Disagree?

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