Common Vulnerabilities and Exposures assigned an identifier CVE-2009-2651 to
the following vulnerability:

Name: CVE-2009-2651
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2651
Assigned: 20090730
Reference: MISC: http://downloads.digium.com/pub/security/AST-2009-004-1.6.1.diff.txt
Reference: CONFIRM: http://downloads.asterisk.org/pub/security/AST-2009-004.html
Reference: BID:35837
Reference: URL: http://www.securityfocus.com/bid/35837
Reference: OSVDB:56571
Reference: URL: http://osvdb.org/56571
Reference: SECTRACK:1022608
Reference: URL: http://www.securitytracker.com/id?1022608
Reference: SECUNIA:36039
Reference: URL: http://secunia.com/advisories/36039
Reference: VUPEN:ADV-2009-2067
Reference: URL: http://www.vupen.com/english/advisories/2009/2067
Reference: XF:asterisk-rtp-dos(52046)
Reference: URL: http://xforce.iss.net/xforce/xfdb/52046

main/rtp.c in Asterisk Open Source 1.6.1 before 1.6.1.2 allows remote
attackers to cause a denial of service (crash) via an RTP text frame
without a certain delimiter, which triggers a NULL pointer dereference
and the subsequent calculation of an invalid pointer.


Note: the upstream advisory indicates that only 1.6.1.x is affected, so this only affects Fedora 11 and rawhide (Fedora 10 has 1.6.0.5).  Upstream patch to correct the issue:

http://downloads.digium.com/pub/security/AST-2009-004-1.6.1.diff.txt

Also note that 1.6.1.2 release corrects this issue as well.