CVE-2021-43566
2.5
LOW
CVSS 3.1
EPSS 0.36%
Description
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.
How to fix CVE-2021-43566
To remediate CVE-2021-43566, upgrade the affected package to a fixed version below.
- Alpine/samba—upgrade to 4.13.17-r0 or later
- —upgrade to 2:4.13.13+dfsg-1~deb11u4 or later
Is CVE-2021-43566 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.13.17-r0
- from 0, < 2:4.13.13+dfsg-1~deb11u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW2.5 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N |