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CVE-2021-31878

Date: July 27, 2021

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.

Severity Score

6.5

Related Resources (8)

Url: http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html

Url: http://downloads.asterisk.org/pub/security/AST-2021-007.html

Url: http://seclists.org/fulldisclosure/2021/Jul/48

Url: https://issues.asterisk.org/jira/browse/ASTERISK-29381

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-31878

Url: https://downloads.digium.com/pub/security/AST-2021-007.html

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-31878

Url: https://www.mend.io/vulnerability-database/CVE-2021-31878

Severity Score

6.5

Weakness Type (CWE)

Reachable Assertion

CWE-617

CVSS v3.1

Base Score:	6.5
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	LOW
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	HIGH

CVSS v2

Base Score:	4.0
Access Vector (AV):	NETWORK
Access Complexity (AC):	LOW
Authentication (AU):	SINGLE
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	PARTIAL
Additional information:

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