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Vulnerability of OpenJPEG: out-of-bounds memory reading via opj_t2_encode_packet

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via opj_t2_encode_packet() of OpenJPEG, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable systems: Fedora, Ubuntu.
Severity of this threat: 2/4.
Creation date: 22/12/2020.
Références of this weakness: CVE-2020-27843, FEDORA-2020-3e00413763, FEDORA-2020-d32853a28d, USN-4685-1, USN-4686-1, VIGILANCE-VUL-34190.

Description of the vulnerability 

An attacker can force a read at an invalid address via opj_t2_encode_packet() of...
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This computer weakness bulletin impacts software or systems such as Fedora, Ubuntu.

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

Solutions for this threat 

This vulnerability workaround will be public soon.
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