CVE-2019-18976
Last modified
CVE-2019-18976 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 6.68% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | >= 13.0.0, <= 13.29.1 |
| Digium | Certified Asterisk | 13.21 |
| Debian | Debian Linux | 9.0 |
References
- http://downloads.asterisk.org/pub/security/AST-2019-008.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List, Third Party Advisory
- https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.htmlThird Party Advisory, VDB Entry
- https://seclists.org/fulldisclosure/2019/Nov/20Mailing List, Third 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 List, Third Party Advisory
- https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.htmlThird Party Advisory, VDB Entry
- https://seclists.org/fulldisclosure/2019/Nov/20Mailing List, Third Party Advisory
- https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
- https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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