The Portable Tool Library (aka PTLib) before 2.10.10, as used in Ekiga before 4.0.1, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted PXML document containing a large number of nested entity references, aka a "billion laughs attack."
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/52659 | third party advisory |
| https://www.suse.com/support/update/announcement/2014/suse-su-20140237-1.html | vendor advisory |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/82885 | vdb entry |
| http://www.ekiga.org/news/2013-02-21/ekiga-4.0.1-stable-available | patch vendor advisory |
| http://lists.fedoraproject.org/pipermail/package-announce/2013-March/099553.html | vendor advisory |
| http://osvdb.org/91439 | vdb entry |
| http://seclists.org/oss-sec/2013/q1/674 | mailing list |
| http://sourceforge.net/p/opalvoip/code/28856 | patch exploit |
| http://www.securityfocus.com/bid/58520 | vdb entry |