The sdump function in sdump.c in fetchmail 6.3.11, 6.3.12, and 6.3.13, when running in verbose mode on platforms for which char is signed, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an SSL X.509 certificate containing non-printable characters with the high bit set, which triggers a heap-based buffer overflow during escaping.
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.mandriva.com/security/advisories?name=MDVSA-2010:037 | vendor advisory |
| http://www.fetchmail.info/fetchmail-SA-2010-01.txt | vendor advisory |
| http://www.securityfocus.com/bid/38088 | vdb entry |
| http://mknod.org/svn/fetchmail/branches/BRANCH_6-3/fetchmail-SA-2010-01.txt | |
| http://www.securitytracker.com/id?1023543 | vdb entry |
| http://secunia.com/advisories/38391 | third party advisory vendor advisory |
| http://osvdb.org/62114 | vdb entry |
| http://www.vupen.com/english/advisories/2010/0296 | vdb entry vendor advisory |