Improper authentication in samba
Priority LOW 30CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 17 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-287.
Summary
A flaw was found in the way samba implemented SMB1 authentication. An attacker could use this flaw to retrieve the plaintext password sent over the wire even if Kerberos authentication was required.
Why it matters now
EPSS 0.01766 78th percentileScored 2026-11-07
Fix Partial Red Hat: 6 advisoriesRed Hat: 17 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | samba | samba 4.15.2, samba 4.14.10, samba 4.13.14 | — | No fix listed | CNA |
- samba Vendor— Affected samba 4.15.2, samba 4.14.10, samba 4.13.14 Fixed in — No fix listed CNA
CPE configurations NVD · 41
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 3.0.0 to before 4.13.14; 4.14.0 to before 4.14.10; 4.15.0 to before 4.15.2 | Vulnerable | Samba |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:gluster_storage:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:gluster_storage:3.5:*:*:*:*:*:*:* | 3.5 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* | 13 | Vulnerable | Red Hat |
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 3.0.0 to before 4.13.14; 4.14.0 to before 4.14.10; 4.15.0 to before 4.15.2 Vulnerable ·Samba
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
- cpe:2.3:a:redhat:gluster_storage:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:gluster_storage:3.5:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* Versions 13 Vulnerable ·Red Hat
Show 31 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:redhat:openstack:16.1:*:*:*:*:*:*:* | 16.1 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:openstack:16.2:*:*:*:*:*:*:* | 16.2 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* | 8.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:* | 8.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.2:*:*:*:*:*:*:* | 8.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:* | 8.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:* | 8.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:* | 8.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_resilient_storage:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* | 8.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* | 8.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* | 8.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:* | 8.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* | 8.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_tus:8.2:*:*:*:*:*:*:* | 8.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 20.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:* | 21.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* | 21.10 | Vulnerable | Canonical |
- cpe:2.3:a:redhat:openstack:16.1:*:*:*:*:*:*:* Versions 16.1 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:openstack:16.2:*:*:*:*:*:*:* Versions 16.2 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_for_scientific_computing:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_resilient_storage:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:* Versions 8.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_tus:8.2:*:*:*:*:*:*:* Versions 8.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:* Versions 21.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:* Versions 21.10 Vulnerable ·Canonical
Remediation
Red Hat 6 advisories
- RHSA-2022:0074 Released 2022-01-11 · Red Hat rating Importantsamba security update
- Red Hat CodeReady Linux Builder EUS (v. 8.2) libsmbclient-devel-4.11.2-18.el8_2, libwbclient-devel-4.11.2-18.el8_2
- Red Hat Enterprise Linux BaseOS EUS (v. 8.2) ctdb-4.11.2-18.el8_2, ctdb-tests-4.11.2-18.el8_2, libsmbclient-4.11.2-18.el8_2 +18
- RHSA-2022:0008 Released 2022-01-04 · Red Hat rating Importantsamba security update
- Red Hat Enterprise Linux BaseOS EUS (v.8.4) ctdb-4.13.3-8.el8_4, ctdb-tests-4.13.3-8.el8_4, libsmbclient-4.13.3-8.el8_4 +19
- Red Hat Enterprise Linux CRB EUS (v.8.4) libsmbclient-devel-4.13.3-8.el8_4, libwbclient-devel-4.13.3-8.el8_4, samba-devel-4.13.3-8.el8_4
- RHSA-2021:5192 Released 2021-12-16 · Red Hat rating Importantsamba security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) libsmbclient-4.10.16-17.el7_9, libwbclient-4.10.16-17.el7_9, samba-4.10.16-17.el7_9 +10
- Red Hat Enterprise Linux Client Optional (v. 7) libsmbclient-devel-4.10.16-17.el7_9, libwbclient-devel-4.10.16-17.el7_9, samba-4.10.16-17.el7_9 +10
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) libsmbclient-devel-4.10.16-17.el7_9, libwbclient-devel-4.10.16-17.el7_9, samba-4.10.16-17.el7_9 +11
- Red Hat Enterprise Linux Server (v. 7) libsmbclient-4.10.16-17.el7_9, libsmbclient-4.10.16-17.el7_9.ppc, libwbclient-4.10.16-17.el7_9 +17
- Red Hat Enterprise Linux Server Optional (v. 7) libsmbclient-devel-4.10.16-17.el7_9, libsmbclient-devel-4.10.16-17.el7_9.ppc, libwbclient-devel-4.10.16-17.el7_9 +14
- Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb-4.10.16-17.el7_9, ctdb-tests-4.10.16-17.el7_9
- Red Hat Enterprise Linux Workstation (v. 7) libsmbclient-4.10.16-17.el7_9, libwbclient-4.10.16-17.el7_9, samba-4.10.16-17.el7_9 +11
- Red Hat Enterprise Linux Workstation Optional (v. 7) libsmbclient-devel-4.10.16-17.el7_9, libwbclient-devel-4.10.16-17.el7_9, samba-dc-4.10.16-17.el7_9 +8
Show 3 more Red Hat advisories
- RHSA-2021:5082 Released 2021-12-13 · Red Hat rating Importantsamba security update
- Red Hat CodeReady Linux Builder (v. 8) libsmbclient-devel-4.14.5-7.el8_5, libwbclient-devel-4.14.5-7.el8_5, samba-devel-4.14.5-7.el8_5
- Red Hat Enterprise Linux AppStream (v. 8) samba-vfs-iouring-4.14.5-7.el8_5
- Red Hat Enterprise Linux BaseOS (v. 8) ctdb-4.14.5-7.el8_5, libsmbclient-4.14.5-7.el8_5, libwbclient-4.14.5-7.el8_5 +18
- RHSA-2021:4844 Released 2021-11-29 · Red Hat rating Importantsamba security update
- Red Hat Gluster 3.5 Samba on RHEL-7 ctdb-4.11.6-114.el7rhgs, libsmbclient-4.11.6-114.el7rhgs, libsmbclient-devel-4.11.6-114.el7rhgs +18
- RHSA-2021:4843 Released 2021-11-29 · Red Hat rating Importantsamba security update
- Red Hat Gluster 3.5 Samba on RHEL-8 ctdb-4.14.5-204.el8rhgs, libsmbclient-4.14.5-204.el8rhgs, libsmbclient-devel-4.14.5-204.el8rhgs +18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2021:5082 |
| Red Hat CodeReady Linux Builder EUS (v. 8.2) | Fixed | RHSA-2022:0074 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:5082 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:5082 |
| Red Hat Enterprise Linux BaseOS EUS (v. 8.2) | Fixed | RHSA-2022:0074 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.4) | Fixed | RHSA-2022:0008 |
| Red Hat Enterprise Linux CRB EUS (v.8.4) | Fixed | RHSA-2022:0008 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux Server Resilient Storage (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2021:5192 |
| Red Hat Gluster 3.5 Samba on RHEL-7 | Fixed | RHSA-2021:4844 |
| Red Hat Gluster 3.5 Samba on RHEL-8 | Fixed | RHSA-2021:4843 |
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2016-2124
- 2026-10-03 Alias added: GHSA-p5c7-5xj7-x9vv
References
Sources
- CVE-2016-2124 · CVE Program
- CVE-2016-2124 · NVD
- FIRST EPSS
- GHSA-p5c7-5xj7-x9vv · GitHub Advisory Database · CC BY 4.0
- CVE-2016-2124 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences