CVE - CVE-2023-49786

CVE-ID
CVE-2023-49786	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
FULLDISC:20231219 [ES2023-01] Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation URL:http://seclists.org/fulldisclosure/2023/Dec/24 MISC:http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html MISC:https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race URL:https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race MISC:https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 URL:https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 MISC:https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq URL:https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq MLIST:[debian-lts-announce] 20231228 [SECURITY] [DLA 3696-1] asterisk security update URL:https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html MLIST:[oss-security] 20231215 [ES2023-01] Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation URL:http://www.openwall.com/lists/oss-security/2023/12/15/7
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20231130	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20231130)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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