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Vulnerability of Samba: privilege escalation

Synthesis of the vulnerability 

An attacker can bypass restrictions of Samba, in order to escalate his privileges.
Impacted systems: Fedora, openSUSE Leap, Samba, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Synology DS***, Synology RS***, Ubuntu.
Severity of this alert: 3/4.
Creation date: 29/04/2021.
Références of this alert: CERTFR-2021-AVI-328, CVE-2021-20254, FEDORA-2021-1d0807008b, FEDORA-2021-7de0418ec8, openSUSE-SU-2021:0636-1, SUSE-SU-2021:1438-1, SUSE-SU-2021:1439-1, SUSE-SU-2021:1442-1, SUSE-SU-2021:1444-1, SUSE-SU-2021:1445-1, SUSE-SU-2021:14709-1, SUSE-SU-2021:1492-1, SUSE-SU-2021:1498-1, Synology-SA-21:17, USN-4930-1, USN-4931-1, VIGILANCE-VUL-35207.

Description of the vulnerability 

An attacker can bypass restrictions of Samba, in order to escalate his privilege...
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This security note impacts software or systems such as Fedora, openSUSE Leap, Samba, SUSE Linux Enterprise Desktop, SLES, Synology DSM, Synology DS***, Synology RS***, Ubuntu.

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

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 weakness announce.

Solutions for this threat 

This vulnerability workaround will be public soon.
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