Date: Mon, 14 Apr 2008 06:20:47 +0000 From: Andrea Barisani <lcars@...rt.org> To: ocert-announce@...ts.ocert.org, oss-security@...ts.openwall.com, bugtraq@...urityfocus.com Subject: [oCERT-2008-003] libpng zero-length chunks incorrect handling 2008/04/12 #2008-003 libpng zero-length chunks incorrect handling Description: Applications using libpng that install unknown chunk handlers, or copy unknown chunks, may be vulnerable to a security issue which may result in incorrect output, information leaks, crashes, or arbitrary code execution. The issue involves libpng incorrectly handling zero length chunks which results in uninitialized memory affecting the control flow of the application. Affected version: The libpng project indicates libpng-1.0.6 through 1.0.32, libpng-1.2.0 through 1.2.26, and libpng-1.4.0beta01 through libpng-1.4.0beta19 built with PNG_READ_UNKNOWN_CHUNKS_SUPPORTED or PNG_READ_USER_CHUNKS_SUPPORTED (default configuration) are affected. Fixed version: libpng version 1.2.27 and 1.0.33 are in beta and will be released on or about April 26, 2008 according to libpng maintainer libpng-1.2.27beta01 Credit: Tavis Ormandy, oCERT Team | Google Security Team CVE: CVE-2008-1382 Timeline: 2008-04-05: contacted libpng maintainers 2008-04-05: vendor confirms 2008-04-05: verification of vendor suggested patch 2008-04-12: libpng-1.2.27beta01 released 2008-04-12: libpng project advisory released 2008-04-12: advisory release References: http://libpng.sourceforge.net/Advisory-1.2.26.txt Links: http://www.libpng.org/pub/png/libpng.html Permalink: http://www.ocert.org/advisories/ocert-2008-003.html -- Andrea Barisani | Founder & Project Coordinator oCERT | Open Source Computer Emergency Response Team <lcars@...rt.org> http://www.ocert.org 0x864C9B9E 0A76 074A 02CD E989 CE7F AC3F DA47 578E 864C 9B9E "Pluralitas non est ponenda sine necessitate"
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