6.5

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 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 permissions checks, relying solely on Samba's permissions.

Data is provided by the National Vulnerability Database (NVD)
Samba ≫ Samba Version < 4.17.12
Samba ≫ Samba Version >= 4.18.0 < 4.18.8
Samba ≫ Samba Version >= 4.19.0 < 4.19.1
Fedoraproject ≫ Fedora Version39
Redhat ≫ Storage Version3.0
Redhat ≫ Enterprise Linux Version8.0
Redhat ≫ Enterprise Linux Eus Version9.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.48% 0.64
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
secalert@redhat.com 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE-276 Incorrect Default Permissions

During installation, installed file permissions are set to allow anyone to modify those files.