CVE-2023-49786
Vulnerability from cvelistv5
Published
2023-12-14 19:47
Modified
2025-02-13 17:18
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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
security-advisories@github.comhttp://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
security-advisories@github.comhttp://seclists.org/fulldisclosure/2023/Dec/24Exploit, Mailing List, Third Party Advisory
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2023/12/15/7Exploit, Mailing List
security-advisories@github.comhttps://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-raceExploit
security-advisories@github.comhttps://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05Patch
security-advisories@github.comhttps://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pqExploit, Vendor Advisory
security-advisories@github.comhttps://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Dec/24Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/12/15/7Exploit, Mailing List
af854a3a-2127-422b-91ae-364da2661108https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-raceExploit
af854a3a-2127-422b-91ae-364da2661108https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pqExploit, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html
Impacted products
Vendor Product Version
asterisk asterisk Version: < 18.20.1
Version: >= 19.0.0, < 20.5.1
Version: = 21.0.0
Version: < 18.9-cert6
 Create a notification for this product.
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      "dataType": "CVE_RECORD",
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  }
}


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