Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | >= 13.0.0, <= 13.29.1 |
| Digium | Certified Asterisk | 13.21 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://downloads.asterisk.org/pub/security/AST-2019-008.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing ListThird Party Advisory
- https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-Third Party AdvisoryVDB Entry
- https://seclists.org/fulldisclosure/2019/Nov/20Mailing ListThird Party Advisory
- https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
- https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1Third Party Advisory
- http://downloads.asterisk.org/pub/security/AST-2019-008.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing ListThird Party Advisory
- https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-Third Party AdvisoryVDB Entry
- https://seclists.org/fulldisclosure/2019/Nov/20Mailing ListThird Party Advisory
- https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
- https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1Third Party Advisory
FAQ
What is CVE-2019-18976?
CVE-2019-18976 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2019-18976?
CVE-2019-18976 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-18976?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk, Digium Certified Asterisk, Debian Debian Linux.