CVE-2021-31878
MEDIUMAsterisk - Reachable Assertion in PJSIP via re-INVITE without SDP
Title source: llmDescription
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.
References (5)
Core 5
Core References
Mailing List, Patch, Third Party Advisory mailing-list
x_refsource_fulldisc
http://seclists.org/fulldisclosure/2021/Jul/48
Patch, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html
Patch, Vendor Advisory x_refsource_misc
http://downloads.asterisk.org/pub/security/AST-2021-007.html
Exploit, Issue Tracking, Vendor Advisory x_refsource_misc
https://issues.asterisk.org/jira/browse/ASTERISK-29381
Patch, Vendor Advisory x_refsource_misc
https://downloads.digium.com/pub/security/AST-2021-007.html
Scores
CVSS v3
6.5
EPSS
0.0243
EPSS Percentile
82.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-617
Status
published
Products (6)
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
Published
Jul 30, 2021
Tracked Since
Feb 18, 2026