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Vulnerability of Asterisk: denial of service via T.38 SDP Re-invite

Synthesis of the vulnerability 

An attacker can trigger a fatal error via T.38 SDP Re-invite of Asterisk, in order to trigger a denial of service.
Vulnerable software: Asterisk Open Source.
Severity of this announce: 2/4.
Creation date: 22/11/2019.
Références of this computer vulnerability: AST-2019-008, CERTFR-2019-AVI-587, CVE-2019-18976, VIGILANCE-VUL-30937.

Description of the vulnerability 

An attacker can trigger a fatal error via T.38 SDP Re-invite of Asterisk, in order to trigger a denial of service.
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This computer threat announce impacts software or systems such as Asterisk Open Source.

Our Vigil@nce team determined that the severity of this computer vulnerability is medium.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this cybersecurity alert.

Solutions for this threat 

Asterisk: version 13.29.2.
The version 13.29.2 is fixed:
  https://www.asterisk.org/downloads
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