73984 : libpng png_rgb_to_gray() Function PNG File Handling Overflow
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
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Timeline

Disclosure Date
2011-07-07

Description

libpng contains an overflow condition in the handling of PNG files. The issue is triggered as user-supplied input is not properly sanitized when promoting palette images to greyscale/alpha images. With a specially crafted PNG file, a context-dependent attacker can cause a buffer overflow to cause a denial of service or potentially execute arbitrary code.

Classification

Location: Context Dependent
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Upgrade to version 1.0.55, 1.2.45, 1.4.8, 1.5.1beta01, 1.5.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

libpng

1.2.20

References

CVE ID: 2011-2690 (see also: NVD)
Secunia Advisory ID: 45046 45362 45405 45415 45460 45461 45492 45635 45646 45660 45843 46417 49660
Bugtraq ID: 48660
ISS X-Force ID: 68538
Mail List Post: http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://lists.apple.com/archives/security-announce/2011/Oct//msg00003.html
Vendor Specific News/Changelog Entry: http://lists.fedoraproject.org/pipermail/package-announce/2011-August/064547.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062934.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063118.html
http://www.gentoo.org/security/en/glsa/glsa-201206-15.xml
http://www.libpng.org/pub/png/libpng.html
https://bugzilla.redhat.com/show_bug.cgi?id=720607
Vendor Specific Advisory URL: http://support.apple.com/kb/HT5002
http://www.debian.org/security/2011/dsa-2287
https://hermes.opensuse.org/messages/11255439
https://hermes.opensuse.org/messages/11259948
https://hermes.opensuse.org/messages/11279547
https://lists.ubuntu.com/archives/ubuntu-security-announce/2011-July/001381.html
Vendor URL: http://www.libpng.org/
Other Advisory URL: http://www.mandriva.com/security/advisories?name=MDVSA-2011:151
http://www.openwall.com/lists/oss-security/2011/07/13/2
http://www.ubuntu.com/usn/USN-1175-1
RedHat RHSA: RHSA-2011:1104 RHSA-2011:1105

Credit

Not Available

CVSSv2 Score

CVSSv2 Base Score = 6.8
Source: nvd.nist.gov | Generated: 2011-07-18 | Disagree?

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