CVE-2019-13161
high-risk
Published 2019-07-12
An issue was discovered in Asterisk Open Source through 13.27.0, 14.x and 15.x through 15.7.2, and 16.x through 16.4.0, and Certified Asterisk through 13.21-cert3. A pointer dereference in chan_sip while handling SDP negotiation allows an attacker to crash Asterisk when handling an SDP answer to an outgoing T.38 re-invite. To exploit this vulnerability an attacker must cause the chan_sip module to send a T.38 re-invite request to them. Upon receipt, the attacker must send an SDP answer containing both a T.38 UDPTL stream and another media stream containing only a codec (which is not permitted according to the chan_sip configuration).
Do I need to act?
~
2.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10
Medium
NETWORK
/ HIGH complexity
Affected Products (20)
References (8)
Vendor Advisory
http://downloads.digium.com/pub/security/AST-2019-003.html
Issue Tracking
https://issues.asterisk.org/jira/browse/ASTERISK-28465
Vendor Advisory
http://downloads.digium.com/pub/security/AST-2019-003.html
Issue Tracking
https://issues.asterisk.org/jira/browse/ASTERISK-28465
55
/ 100
high-risk
Severity
17/34 · Moderate
Exploitability
5/34 · Minimal
Exposure
33/34 · Critical