X.org libFS 1.0.4 and earlier allows X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to an unexpected sign extension in the FSOpenServer function.
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://www.debian.org/security/2013/dsa-2687 | vendor advisory |
| http://www.ubuntu.com/usn/USN-1853-1 | vendor advisory |
| http://www.openwall.com/lists/oss-security/2013/05/23/3 | mailing list |
| http://www.securityfocus.com/bid/60130 | vdb entry |
| http://www.x.org/wiki/Development/Security/Advisory-2013-05-23 | vendor advisory |