CVE-2019-18976

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.17%
Vendor Advisory asterisk.org Vendor Advisory asterisk.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.asterisk.org/downloads/security-advisories vendor advisory
https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1 third party advisory
https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html vdb entry third party advisory
https://seclists.org/fulldisclosure/2019/Nov/20 third party advisory mailing list
http://downloads.asterisk.org/pub/security/AST-2019-008.html vendor advisory
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2019-18976?
CVE-2019-18976 has been scored as a high severity vulnerability.
How to fix CVE-2019-18976?
To fix CVE-2019-18976, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-18976 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-18976 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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