VOIP: Digium Asterisk SIP Terminated Channel ACK with SDP Denial of Service
This signature detects attempts to exploit a known vulnerability against Asterisk Open Source and Certified Asterisk. A successful attack can result in a denial-of-service condition.
Extended Description
The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.17.x through 1.8.22.x, 1.8.23.x before 1.8.23.1, and 11.x before 11.5.1 and Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2 allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an ACK with SDP to a previously terminated channel. NOTE: some of these details are obtained from third party information.
Affected Products
Digium asterisk
Short Name
VOIP:SIP:DIGIUM-ASTERISK-DOS
Severity
Minor
Recommended
False
Recommended Action
Drop
Category
VOIP
Keywords
ACK Asterisk CVE-2013-5641 Channel Denial Digium SDP SIP Service Terminated bid:62021 of with
Release Date
10/24/2013
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3761
False Positive
Unknown
Vendors
Digium
CVSS Score
5.0