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CVE-2021-26906

Published: Feb 18, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-404
NVD MITRE
5.9CVSSMEDIUM
EPSS Score
2.5%
Top 17.0%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

An issue was discovered in res_pjsip_session.c in Digium Asterisk through 13.38.1; 14.x, 15.x, and 16.x through 16.16.0; 17.x through 17.9.1; and 18.x through 18.2.0, and Certified Asterisk through 16.8-cert5. An SDP negotiation vulnerability in PJSIP allows a remote server to potentially crash Asterisk by sending specific SIP responses that cause an SDP negotiation failure.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-404

Affected Products

n/an/a
asteriskdigiumCommunications
certified asteriskdigiumCommunications
digiumcommercialUSCommunicationsaka digium, asterisk

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://downloads.asterisk.org/pub/security/
downloads.asterisk.org
http://seclists.org/fulldisclosure/2021/Feb/61
seclists.org
https://downloads.asterisk.org/pub/security/AST-2021-005.html
downloads.asterisk.org
and 2 more references View all →

Timeline

Published
Feb 18, 2021
Last Updated
Nov 21, 2024

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