CVE-2010-1205: Buffer Overflow

Description of problem:

http://www.libpng.org/pub/png/libpng.html

Several versions of libpng through 1.4.2 (and through 1.2.43 in the older series) contain a bug whereby progressive applications such as web browsers (or the rpng2 demo app included in libpng) could receive an extra row of image data beyond the height reported in the header, potentially leading to an out-of-bounds write to memory (depending on how the application is written) and the possibility of execution of an attacker's code with the privileges of the libpng user (including remote compromise in the case of a libpng-based browser visiting a hostile web site). This vulnerability has been assigned ID CVE-2010-1205 (via Mozilla).

An additional memory-leak bug, involving images with malformed sCAL chunks, is also present; it could lead to an application crash (denial of service) when viewing such images.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce: 1. 2. 3. Actual results:

Expected results:

Additional info:

— Red Hat

libpng is vulnerable to a buffer overflow, caused by improper bounds checking by progressive applications when handling image row data. By sending an extra image row data beyond the reported height in the header, a remote attacker could overflow a buffer and execute arbitrary code on the system with the privileges of the victim.

— IBM