Vulnerability Description
An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.
CVSS Score
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | 16.17.0 |
Related Weaknesses (CWE)
References
- http://downloads.asterisk.org/pub/security/AST-2021-007.htmlPatchVendor Advisory
- http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-APatchThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2021/Jul/48Mailing ListPatchThird Party Advisory
- https://downloads.digium.com/pub/security/AST-2021-007.htmlPatchVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29381ExploitIssue TrackingVendor Advisory
- http://downloads.asterisk.org/pub/security/AST-2021-007.htmlPatchVendor Advisory
- http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-APatchThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2021/Jul/48Mailing ListPatchThird Party Advisory
- https://downloads.digium.com/pub/security/AST-2021-007.htmlPatchVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29381ExploitIssue TrackingVendor Advisory
FAQ
What is CVE-2021-31878?
CVE-2021-31878 is a vulnerability with a CVSS score of 6.5 (MEDIUM). An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.
How severe is CVE-2021-31878?
CVE-2021-31878 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-31878?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk.