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Date: Mon, 2 Mar 2009 14:44:40 -0500 (EST)
From: "Steven M. Christey" <>
cc: Marcus Meissner <>
Subject: Re: CVE request: optipng security release

Name: CVE-2009-0749
Status: Candidate
Reference: MLIST:[oss-security] 20090224 CVE request: optipng security release
Reference: URL:
Reference: MLIST:[oss-security] 20090225 Re: CVE request: optipng security release
Reference: URL:
Reference: CONFIRM:
Reference: CONFIRM:
Reference: BID:33873
Reference: URL:
Reference: SECUNIA:34035
Reference: URL:
Reference: VUPEN:ADV-2009-0510
Reference: URL:
Reference: XF:optipng-gifreadnextextension-code-execution(48879)
Reference: URL:

Use-after-free vulnerability in the GIFReadNextExtension function in
lib/pngxtern/gif/gifread.c in OptiPNG 0.6.2 and earlier allows
context-dependent attackers to cause a denial of service (application
crash) via a crafted GIF image that causes the realloc function to
return a new pointer, which triggers memory corruption when the old
pointer is accessed.

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