chan_sip.c in Asterisk Open Source 1.8.x before 184.108.40.206 and 10.x
before 10.0.1, when the res_srtp module is used and media support is
improperly configured, allows remote attackers to cause a denial of
service (NULL pointer dereference and daemon crash) via a crafted SDP
message with a crypto attribute and a (1) video or (2) text media
type, as demonstrated by CSipSimple.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[oss-security] 20120120 CVE Request -- Asterisk AST-2012-001 / Remote DoS while processing crypto line for media stream with non-existing RTP
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