Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.
References
Link | Resource |
---|---|
http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html | Exploit Third Party Advisory VDB Entry |
http://seclists.org/fulldisclosure/2023/Dec/24 | Exploit Mailing List Third Party Advisory |
http://www.openwall.com/lists/oss-security/2023/12/15/7 | Exploit Mailing List |
https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race | Exploit |
https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 | Patch |
https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq | Exploit Vendor Advisory |
https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-12-14T19:47:46.306Z
Updated: 2023-12-14T19:47:46.306Z
Reserved: 2023-11-30T13:39:50.862Z
Link: CVE-2023-49786
JSON object: View
NVD Information
Status : Modified
Published: 2023-12-14T20:15:52.927
Modified: 2023-12-29T00:15:50.043
Link: CVE-2023-49786
JSON object: View
Redhat Information
No data.