Race Condition Affecting samba-client package, versions <2:4.17.5-0.amzn2023.0.2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.11% (47th percentile)

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  • Snyk IDSNYK-AMZN2023-SAMBACLIENT-3340722
  • published6 Mar 2023
  • disclosed11 Jan 2022

Introduced: 11 Jan 2022

CVE-2021-43566  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 samba-client to version 2:4.17.5-0.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2023-032.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba-client package and not the samba-client package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.

CVSS Scores

version 3.1