VulnerabilityModified
CVE-2021-26906
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.
MEDIUM 5.9EPSS 2.55%
Does this matter?
Lower severity and a low EPSS score (2.55%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.55% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-404
- Affected
- digium/asterisk · digium/certified asterisk
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.htmlThird Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/61Mailing List, Patch, Third Party Advisory
- https://downloads.asterisk.org/pub/security/Vendor Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-005.htmlVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29196Issue Tracking, Patch, Vendor Advisory
- http://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.htmlThird Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/61Mailing List, Patch, Third Party Advisory
- https://downloads.asterisk.org/pub/security/Vendor Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-005.htmlVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29196Issue Tracking, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.