Vulnerability in Digium Asterisk
CVE-2021-26906
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.
EPSS: 0.025 (83.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Digium Asterisk
- Digium Certified_asterisk — versions 16.8
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (mailing-list, Patch, x_refsource_FULLDISC, Mailing List, Third Party Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Issue Tracking, Vendor Advisory)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-26906?
- CVE-2021-26906 is a medium-severity vulnerability in Digium Asterisk, classified under Improper Resource Shutdown or Release. CVSS score: 5.9/10. Published 2021-02-18.
- How severe is CVE-2021-26906?
- Medium severity. CVSS v3 base score is 5.9 out of 10.