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Vulnerability of Asterisk: denial of service via T.38 Negotiation

Synthesis of the vulnerability 

An attacker can trigger a fatal error via T.38 Negotiation of Asterisk, in order to trigger a denial of service.
Vulnerable products: Asterisk Open Source.
Severity of this weakness: 2/4.
Creation date: 18/02/2021.
Références of this bulletin: AST-2021-002, CERTFR-2021-AVI-136, CVE-2021-26717, VIGILANCE-VUL-34614.

Description of the vulnerability 

An attacker can trigger a fatal error via T.38 Negotiation of Asterisk, in order...
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This security threat impacts software or systems such as Asterisk Open Source.

Our Vigil@nce team determined that the severity of this computer weakness note 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 computer threat alert.

Solutions for this threat 

Solutions, fixes, patches and workarounds for this vulnerability are not yet public.
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