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
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
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | samba | No Fix Planned | ||
| Amazon Linux 2 - Core | samba | No Fix Planned | ||
| Amazon Linux 2023 | samba | 2023-02-17 | ALAS2023-2023-032 | Fixed |
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 |