01 Record
CVE-2023-4091
Samba: smb clients can truncate files with read-only permissions
MediumPUBLISHEDCNA: redhat
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
02 Description
Samba: smb clients can truncate files with read-only permissions
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 1.33% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 70.8% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-11-03 07:56Z2 YR AGO
- Last updated
- 2025-11-20 18:27Z11 MO AGO
- Reserved
- 2023-08-02
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-276Incorrect Default PermissionsBase
- Data version
- 5.2
- Document digest
- 46dbea945b76ddec36b69b686a3d07996f2513b8122523c2eff2190b20de363e
05 Affected products
VendorProductVersionsPlatforms
06 References
- access.redhat.comRHSA-2023:6209https://access.redhat.com/errata/RHSA-2023:6209
- access.redhat.comRHSA-2023:6744https://access.redhat.com/errata/RHSA-2023:6744
- access.redhat.comRHSA-2023:7371https://access.redhat.com/errata/RHSA-2023:7371
- access.redhat.comRHSA-2023:7408https://access.redhat.com/errata/RHSA-2023:7408
- access.redhat.comRHSA-2023:7464https://access.redhat.com/errata/RHSA-2023:7464
- access.redhat.comRHSA-2023:7467https://access.redhat.com/errata/RHSA-2023:7467
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4091
- bugzilla.redhat.comRHBZ#2241882https://bugzilla.redhat.com/show_bug.cgi?id=2241882
- bugzilla.samba.orghttps://bugzilla.samba.org/show_bug.cgi?id=15439
- www.samba.orghttps://www.samba.org/samba/security/CVE-2023-4091.html
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20231124-0002/
07 Fixed in
AlmaLinux 8
- ctdb Fixed in 4.18.6-2.el8_9.alma.1
- libnetapi Fixed in 4.18.6-2.el8_9.alma.1
- libnetapi-devel Fixed in 4.18.6-2.el8_9.alma.1
- libsmbclient Fixed in 4.18.6-2.el8_9.alma.1
- libsmbclient-devel Fixed in 4.18.6-2.el8_9.alma.1
- libwbclient Fixed in 4.18.6-2.el8_9.alma.1
- libwbclient-devel Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba-dc Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba-devel Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba-test Fixed in 4.18.6-2.el8_9.alma.1
- samba Fixed in 4.18.6-2.el8_9.alma.1
- samba-client Fixed in 4.18.6-2.el8_9.alma.1
- samba-client-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-common Fixed in 4.18.6-2.el8_9.alma.1
- samba-common-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-common-tools Fixed in 4.18.6-2.el8_9.alma.1
- samba-dc-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-dcerpc Fixed in 4.18.6-2.el8_9.alma.1
- samba-devel Fixed in 4.18.6-2.el8_9.alma.1
- samba-krb5-printing Fixed in 4.18.6-2.el8_9.alma.1
- samba-ldb-ldap-modules Fixed in 4.18.6-2.el8_9.alma.1
- samba-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-pidl Fixed in 4.18.6-2.el8_9.alma.1
- samba-test Fixed in 4.18.6-2.el8_9.alma.1
- samba-test-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-tools Fixed in 4.18.6-2.el8_9.alma.1
- samba-usershares Fixed in 4.18.6-2.el8_9.alma.1
- samba-vfs-iouring Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind-clients Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind-krb5-locator Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind-modules Fixed in 4.18.6-2.el8_9.alma.1
- samba-winexe Fixed in 4.18.6-2.el8_9.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- ctdb Fixed in 4.18.6-101.el9_3.alma.1
- libnetapi Fixed in 4.18.6-101.el9_3.alma.1
- libnetapi-devel Fixed in 4.18.6-101.el9_3.alma.1
- libsmbclient Fixed in 4.18.6-101.el9_3.alma.1
- libsmbclient-devel Fixed in 4.18.6-101.el9_3.alma.1
- libwbclient Fixed in 4.18.6-101.el9_3.alma.1
- libwbclient-devel Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba-dc Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba-devel Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba-test Fixed in 4.18.6-101.el9_3.alma.1
- samba Fixed in 4.18.6-101.el9_3.alma.1
- samba-client Fixed in 4.18.6-101.el9_3.alma.1
- samba-client-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-common Fixed in 4.18.6-101.el9_3.alma.1
- samba-common-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-common-tools Fixed in 4.18.6-101.el9_3.alma.1
- samba-dc-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-dcerpc Fixed in 4.18.6-101.el9_3.alma.1
- samba-devel Fixed in 4.18.6-101.el9_3.alma.1
- samba-krb5-printing Fixed in 4.18.6-101.el9_3.alma.1
- samba-ldb-ldap-modules Fixed in 4.18.6-101.el9_3.alma.1
- samba-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-pidl Fixed in 4.18.6-101.el9_3.alma.1
- samba-test Fixed in 4.18.6-101.el9_3.alma.1
- samba-test-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-tools Fixed in 4.18.6-101.el9_3.alma.1
- samba-usershares Fixed in 4.18.6-101.el9_3.alma.1
- samba-vfs-iouring Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind-clients Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind-krb5-locator Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind-modules Fixed in 4.18.6-101.el9_3.alma.1
- samba-winexe Fixed in 4.18.6-101.el9_3.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- ctdb Fixed in 4.18.6-2.el8_9.alma.1
- libnetapi Fixed in 4.18.6-2.el8_9.alma.1
- libnetapi-devel Fixed in 4.18.6-2.el8_9.alma.1
- libsmbclient Fixed in 4.18.6-2.el8_9.alma.1
- libsmbclient-devel Fixed in 4.18.6-2.el8_9.alma.1
- libwbclient Fixed in 4.18.6-2.el8_9.alma.1
- libwbclient-devel Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba-dc Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba-devel Fixed in 4.18.6-2.el8_9.alma.1
- python3-samba-test Fixed in 4.18.6-2.el8_9.alma.1
- samba Fixed in 4.18.6-2.el8_9.alma.1
- samba-client Fixed in 4.18.6-2.el8_9.alma.1
- samba-client-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-common Fixed in 4.18.6-2.el8_9.alma.1
- samba-common-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-common-tools Fixed in 4.18.6-2.el8_9.alma.1
- samba-dc-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-dcerpc Fixed in 4.18.6-2.el8_9.alma.1
- samba-devel Fixed in 4.18.6-2.el8_9.alma.1
- samba-krb5-printing Fixed in 4.18.6-2.el8_9.alma.1
- samba-ldb-ldap-modules Fixed in 4.18.6-2.el8_9.alma.1
- samba-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-pidl Fixed in 4.18.6-2.el8_9.alma.1
- samba-test Fixed in 4.18.6-2.el8_9.alma.1
- samba-test-libs Fixed in 4.18.6-2.el8_9.alma.1
- samba-tools Fixed in 4.18.6-2.el8_9.alma.1
- samba-usershares Fixed in 4.18.6-2.el8_9.alma.1
- samba-vfs-iouring Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind-clients Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind-krb5-locator Fixed in 4.18.6-2.el8_9.alma.1
- samba-winbind-modules Fixed in 4.18.6-2.el8_9.alma.1
- samba-winexe Fixed in 4.18.6-2.el8_9.alma.1
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- ctdb Fixed in 4.18.6-101.el9_3.alma.1
- libnetapi Fixed in 4.18.6-101.el9_3.alma.1
- libnetapi-devel Fixed in 4.18.6-101.el9_3.alma.1
- libsmbclient Fixed in 4.18.6-101.el9_3.alma.1
- libsmbclient-devel Fixed in 4.18.6-101.el9_3.alma.1
- libwbclient Fixed in 4.18.6-101.el9_3.alma.1
- libwbclient-devel Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba-dc Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba-devel Fixed in 4.18.6-101.el9_3.alma.1
- python3-samba-test Fixed in 4.18.6-101.el9_3.alma.1
- samba Fixed in 4.18.6-101.el9_3.alma.1
- samba-client Fixed in 4.18.6-101.el9_3.alma.1
- samba-client-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-common Fixed in 4.18.6-101.el9_3.alma.1
- samba-common-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-common-tools Fixed in 4.18.6-101.el9_3.alma.1
- samba-dc-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-dcerpc Fixed in 4.18.6-101.el9_3.alma.1
- samba-devel Fixed in 4.18.6-101.el9_3.alma.1
- samba-krb5-printing Fixed in 4.18.6-101.el9_3.alma.1
- samba-ldb-ldap-modules Fixed in 4.18.6-101.el9_3.alma.1
- samba-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-pidl Fixed in 4.18.6-101.el9_3.alma.1
- samba-test Fixed in 4.18.6-101.el9_3.alma.1
- samba-test-libs Fixed in 4.18.6-101.el9_3.alma.1
- samba-tools Fixed in 4.18.6-101.el9_3.alma.1
- samba-usershares Fixed in 4.18.6-101.el9_3.alma.1
- samba-vfs-iouring Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind-clients Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind-krb5-locator Fixed in 4.18.6-101.el9_3.alma.1
- samba-winbind-modules Fixed in 4.18.6-101.el9_3.alma.1
- samba-winexe Fixed in 4.18.6-101.el9_3.alma.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- samba Fixed in 2:4.17.12+dfsg-0+deb12u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- samba Fixed in 2:4.19.1+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- samba Fixed in 2:4.19.1+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- samba Fixed in 2:4.15.13+dfsg-0ubuntu0.20.04.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- samba Fixed in 2:4.15.13+dfsg-0ubuntu1.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- samba Fixed in 2:4.18.6+dfsg-1ubuntu2.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- samba No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- samba No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- samba No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.