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CVE-2021-20316

Public on 2022-02-02
Modified on 2024-01-30
Description

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.

A fix for CVE-2021-20316 will not be provided for Amazon Linux 1 and Amazon Linux 2. You can mitigate this issue by disabling SMBv1.
To do so, add server min protocol = SMB2 to the [global] section of /etc/samba/smb.conf

Severity
Medium
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CVSS v3 Base Score
6.8
See breakdown
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2023 samba 2023-02-17 20:44 ALAS2023-2023-032

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 6.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
NVD CVSSv3 6.8 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N