Home/CVE/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
CVE

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

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.

MEDIUM · CVSS 6.5 EPSS 0.0019
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-617Reachable Assertion
▤

Affected Products & Versions

1
digium asteriskall versions
⚠

Public Exploits & PoCs

2
pocpacketstormsecurity.com · Asterisk-Project-Security-Advisory-AST-2021-007.htmlpacketstormsecurity.com
pocissues.asterisk.org · ASTERISK-29381issues.asterisk.org
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Jul 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://downloads.asterisk.org/pub/security/AST-2021-007.htmlPatchVendor Advisory
http://seclists.org/fulldisclosure/2021/Jul/48Mailing ListPatchThird Party Advisory
https://downloads.digium.com/pub/security/AST-2021-007.htmlPatchVendor Advisory
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