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CVE-2023-49786

Status Candidate

Overview

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.

Related Files

Debian Security Advisory 5596-1
Posted Jan 5, 2024
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5596-1 - Multiple security vulnerabilities have been discovered in Asterisk, an Open Source Private Branch Exchange.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2023-37457, CVE-2023-38703, CVE-2023-49294, CVE-2023-49786
SHA-256 | c9359b6983497697c00903ccf8711da8c38c58bb9a04feff50dc4b063da49212
Download | Favorite | View
Asterisk 20.1.0 Denial Of Service
Posted Dec 15, 2023
Authored by Sandro Gauci | Site enablesecurity.com

When handling DTLS-SRTP for media setup, Asterisk version 20.1.0 is susceptible to denial of service due to a race condition in the hello handshake phase of the DTLS protocol. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack.

tags | exploit, denial of service, protocol
advisories | CVE-2023-49786
SHA-256 | 64a70704bf3c592f3c715409a2cca70dea12a637204ffa690f04e1d61f8e5387
Download | Favorite | View
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