CVE-2021-31878
MEDIUMCVSS 6.5/10EPSS 2.43%
Last modified
CVE-2021-31878 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 2.43% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | 16.17.0 |
| Digium | Asterisk | 16.18.0 |
| Digium | Asterisk | 16.19.0 |
| Digium | Asterisk | 18.3.0 |
| Digium | Asterisk | 18.4.0 |
| Digium | Asterisk | 18.5.0 |
References
- http://downloads.asterisk.org/pub/security/AST-2021-007.htmlPatch, Vendor Advisory
- http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.htmlPatch, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Jul/48Mailing List, Patch, Third Party Advisory
- https://downloads.digium.com/pub/security/AST-2021-007.htmlPatch, Vendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29381Exploit, Issue Tracking, Vendor Advisory
- http://downloads.asterisk.org/pub/security/AST-2021-007.htmlPatch, Vendor Advisory
- http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.htmlPatch, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Jul/48Mailing List, Patch, Third Party Advisory
- https://downloads.digium.com/pub/security/AST-2021-007.htmlPatch, Vendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29381Exploit, Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31878?
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 a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31878?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-31878?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST