CVE-2023-4091
Severity
6.5MEDIUM
EPSS
0.5%
top 35.12%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedNov 3
Description
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 allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system per…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:NExploitability: 2.8 | Impact: 3.6
Affected Packages4 packages
Also affects: Fedora 39, Enterprise Linux 8.0, 9.0
🔴Vulnerability Details
6GHSA▶
GHSA-f6jj-3gjw-frjm: A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS modul↗2023-11-03
OSV▶
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 modul↗2023-11-03