CVE-2023-49786
CVSS 3.1 Score 5.9 of 10 (medium)
Details
Summary
CVE-2023-49786 is a Denial of Service (DoS) vulnerability affecting Asterisk, an open-source private branch exchange and telephony toolkit. Versions prior to 18.20.1, 20.5.1, and 21.0.1, as well as certified-asterisk prior to 18.9-cert6, are susceptible to this issue. The vulnerability stems from a race condition in the DTLS protocol's hello handshake phase during media setup for DTLS-SRTP. An attacker can continuously exploit this race condition, preventing new DTLS-SRTP encrypted calls from being established, potentially causing a massive DoS on vulnerable Asterisk servers. A fix for this vulnerability is available in commit d7d7764cb07c8a1872804321302ef93bf62cba05, which is included in versions 18.20.1, 20.5.1, 21.0.1, and 18.9-cert6.
Prevent cyber attacks with Recorded Future by prioritizing and patching critical vulnerabilities being exploited by threat actors targeting your industry. Book your demo to learn more.
Advisories, Assessments, and Mitigations
Prioritize, Pinpoint, and Act to Prevent Vulnerability Exploits with Recorded Future
- Gain complete coverage of your cyber, third party, and physical attack surface
- Proactively mitigate threats before they turn into costly attacks
- Make fast, effective, data-driven decisions