Vulnerability in Samba

CVE-2023-4091

A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol a…

EPSS: 0.012 (64.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-4091?
CVE-2023-4091 is a medium-severity vulnerability in Samba, classified under Incorrect Default Permissions. CVSS score: 6.5/10. Published 2023-11-03.
How severe is CVE-2023-4091?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2023-4091 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.