CVE-2019-13161
asterisk - security update
Description
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).
How to fix CVE-2019-13161
To remediate CVE-2019-13161, upgrade the affected package to a fixed version below.
- —upgrade to 16.3.0-r2 or later
- —upgrade to 1:16.2.1~dfsg-2 or later
- —upgrade to 1:13.14.1~dfsg-2+deb9u6 or later
Is CVE-2019-13161 being exploited?
Low — EPSS is 2.3%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 16.3.0-r2
- from 0, < 1:16.2.1~dfsg-2
- from 0, < 1:13.14.1~dfsg-2+deb9u6
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |