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Vulnerability of umoci: write access via Unpack Symlink Traversal

Synthesis of the vulnerability 

An attacker can bypass access restrictions via Unpack Symlink Traversal of umoci, in order to alter data.
Vulnerable systems: Fedora, openSUSE Leap, SLES.
Severity of this threat: 2/4.
Creation date: 09/04/2021.
Références of this weakness: CVE-2021-29136, FEDORA-2021-2e174e8a96, FEDORA-2021-601ee898f7, openSUSE-SU-2021:0548-1, SUSE-SU-2021:1116-1, VIGILANCE-VUL-35048.

Description of the vulnerability 

An attacker can bypass access restrictions via Unpack Symlink Traversal of umoci...
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This threat bulletin impacts software or systems such as Fedora, openSUSE Leap, SLES.

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

Solutions for this threat 

Fixes for this vulnerability are not yet public.
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