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libpng Multiple Denial of Service Vulnerabilities
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Secunia Advisory:
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SA27093
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Release Date:
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2007-10-08
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Last Update:
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2007-10-09
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | libpng 1.x
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| | CVE reference: | CVE-2007-5268 (Secunia mirror)
CVE-2007-5269 (Secunia mirror)
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Description:
Some vulnerabilities have been reported in libpng, which can be exploited by malicious people to cause a DoS (Denial of Service).
1) Certain errors within libpng, including a logical NOT instead of a bitwise NOT in pngtrtran.c, an error in the 16bit cheap transparency extension, and an incorrect use of sizeof() may be exploited to crash an application using the library.
2) Various out-of-bounds read errors exist within the functions "png_handle_pCAL()", "png_handle_sCAL()", "png_push_read_tEXt()", "png_handle_iTXt()", and "png_handle_ztXt()", which may be exploited by exploited to crash an application using the library.
The vulnerabilities are reported in versions prior to 1.2.21.
Solution:
Update to version 1.2.21.
Provided and/or discovered by:
1) George Cook and Jeff Phillips
2) Tavis Ormandy
Changelog:
2007-10-09: Added CVE reference.
Original Advisory:
http://www.libpng.org/pub/png/libpng.html
http://sourceforge.net/mailarchive/fo....net&forum_name=png-mng-implement
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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8 Related Secunia Security Advisories
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1. libpng Unknown Chunk Processing Uninitialized Memory Access
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2. libpng ICC Profile Chunk Denial of Service Vulnerability
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3. libpng tRNS Chunk Denial of Service
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4. libpng sPLT Chunk Handling Denial of Service
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5. libpng "png_set_strip_alpha()" Buffer Overflow Vulnerability
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6. libpng Integer Overflow and Buffer Overflow Vulnerabilities
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7. libpng Multiple Vulnerabilities
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8. libpng Potential Denial of Service Vulnerability
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