CVE-2021-31878

Public Exploit

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.30%
Vendor Advisory asterisk.org Vendor Advisory digium.com Vendor Advisory asterisk.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://seclists.org/fulldisclosure/2021/Jul/48 mailing list third party advisory patch
http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html vdb entry third party advisory patch
http://downloads.asterisk.org/pub/security/AST-2021-007.html patch vendor advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29381 issue tracking exploit vendor advisory
https://downloads.digium.com/pub/security/AST-2021-007.html patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-31878?
CVE-2021-31878 has been scored as a medium severity vulnerability.
How to fix CVE-2021-31878?
To fix CVE-2021-31878, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-31878 being actively exploited in the wild?
It is possible that CVE-2021-31878 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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