Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation
Summary
Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation
Original description
The description as published by the source.
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: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2023-49786 asterisk Fixed in: 18.20.2-r0
- Debian DEBIAN-CVE-2023-49786 asterisk Fixed in: 1:16.28.0~dfsg-0+deb11u4
- Ubuntu UBUNTU-CVE-2023-49786 asterisk
References
- advisory github.com
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- web packetstormsecurity.com
- web seclists.org
- web openwall.com
- web lists.debian.org