CVE-2023-49786
Assigner: GitHub_M
Published: 2023-12-14T19:47:46.306Z
State: PUBLISHED
title: Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation
problemTypes: descriptions: cweId: CWE-703
description: CWE-703: Improper Check or Handling of Exceptional Conditions
type: CWE
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
affected: vendor: asterisk
product: asterisk
versions: version: < 18.20.1
status: affected
version: >= 19.0.0, < 20.5.1
status: affected
version: = 21.0.0
status: affected
version: < 18.9-cert6
status: affected
descriptions: value: 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.
source: advisory: GHSA-hxj9-xwr8-w8pq
discovery: UNKNOWN