pngrtran.c in libpng 1.5.x before 1.5.1 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted palette-based PNG image that triggers a buffer overflow, related to the png_do_expand_palette function, the png_do_rgb_to_gray function, and an integer underflow. NOTE: some of these details are obtained from third party information.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://secunia.com/advisories/42863 | third party advisory vendor advisory |
| http://osvdb.org/70417 | vdb entry |
| http://www.kb.cert.org/vuls/id/643140 | third party advisory us government resource |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/64637 | vdb entry |
| ftp://ftp.simplesystems.org/pub/png-group/src/libpng-1.5.1beta01-README.txt | |
| http://securitytracker.com/id?1024955 | vdb entry |
| ftp://ftp.simplesystems.org/pub/png-group/src/libpng-1.5.1beta01-1.5.0-diff.txt | |
| http://sourceforge.net/mailarchive/forum.php?thread_name=002b01cbb0e2%24ae636c80%240b2a4580%24%40acm.org&forum_name=png-mng-implement | |
| http://www.vupen.com/english/advisories/2011/0080 | vdb entry vendor advisory |