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CVE-2019-18976
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…
- 7.5HighCVSS base score
- 12.8%Exploitation in 30 daysEPSS · top 3.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By mitre
- 8 days later
· 8 days later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 12.8% · top 3.7% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References6
- https://www.asterisk.org/downloads/security-advisories (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1 (opens in a new tab)x_refsource_MISCx_transferred
- https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html (opens in a new tab)x_refsource_MISCx_transferred
- https://seclists.org/fulldisclosure/2019/Nov/20 (opens in a new tab)x_refsource_MISCx_transferred
- http://downloads.asterisk.org/pub/security/AST-2019-008.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- [debian-lts-announce] 20220403 [SECURITY] [DLA 2969-1] asterisk security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-8638 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-18976)Record last updated .