CVE-2019-18976
7.5
HIGH
CVSS 3.1
EPSS 0.17%
Description
An issue was discovered in res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.
How to fix CVE-2019-18976
To remediate CVE-2019-18976, upgrade the affected package to a fixed version below.
- Debian/asterisk—upgrade to 1:16.1.1~dfsg-1 or later
Is CVE-2019-18976 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:16.1.1~dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |