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Vulnerability of Asterisk: denial of service via res_pjsip_session

Synthesis of the vulnerability 

An attacker can trigger a fatal error via res_pjsip_session of Asterisk, in order to trigger a denial of service.
Impacted products: Asterisk Open Source.
Severity of this bulletin: 2/4.
Creation date: 06/11/2020.
Références of this threat: AST-2020-001, CERTFR-2020-AVI-720, CVE-2020-28327, ES2020-02, VIGILANCE-VUL-33843.

Description of the vulnerability 

An attacker can trigger a fatal error via res_pjsip_session of Asterisk, in orde...
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This security note impacts software or systems such as Asterisk Open Source.

Our Vigil@nce team determined that the severity of this threat announce is medium.

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

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this computer weakness announce.

Solutions for this threat 

Patches for this vulnerability are not yet public.
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