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