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Vulnerability of Gstreamer: use after free via Matroska File

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via Matroska File of Gstreamer, in order to trigger a denial of service, and possibly to run code.
Impacted products: Debian, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 26/04/2021.
Références of this threat: CVE-2021-3497, DLA-2640-1, DSA-4900-1, USN-4928-1, VIGILANCE-VUL-35157.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via Matroska File of Gstr...
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This computer vulnerability bulletin impacts software or systems such as Debian, Ubuntu.

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

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

An attacker with a expert ability can exploit this threat note.

Solutions for this threat 

Patches for this vulnerability are not yet public.
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