NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package asterisk (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UBUNTU2004-ASTERISK-641655
- published10 Sept 2020
- disclosed22 Nov 2019
Introduced: 22 Nov 2019
CVE-2019-18976 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream asterisk package and not the asterisk package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-18976
- http://downloads.asterisk.org/pub/security/AST-2019-008.html
- https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html
- https://seclists.org/fulldisclosure/2019/Nov/20
- https://www.asterisk.org/downloads/security-advisories
- https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html