samba: Some code path don't enforce smb signing, when they should
Published Jul 26, 2018
7.4
HIGHCVSS 3.1
EPSS 13.17%
Description
It was found that samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8 did not enforce "SMB signing" when certain configuration options were enabled. A remote attacker could launch a man-in-the-middle attack and retrieve information in plain-text.
Affected products
-
- Version 4.4.16StatusaffectedConstraints-
- Version 4.5.14StatusaffectedConstraints-
- Version 4.6.8StatusaffectedConstraints-
- Version 4.7.0StatusaffectedConstraints-
- Version
Configuration 1
Configuration 2
- 6.0
- 7.0
- 6.0
- 7.0
- 6.0
- 7.0
Configuration 3
- 3.0
Running on/with
- 6.0
- 7.0
Configuration 4
- 8.0
- 9.0
No data.
Red Hat Enterprise Linux 6
samba-0:3.6.23-45.el6_9
Fixed · RHSA-2017:2789
Red Hat Enterprise Linux 6
samba4-0:4.2.10-11.el6_9
Fixed · RHSA-2017:2791
Red Hat Enterprise Linux 7
samba-0:4.6.2-11.el7_4
Fixed · RHSA-2017:2790
Red Hat Gluster Storage 3.3 for RHEL 6
samba-0:4.6.3-6.el6rhs
Fixed · RHSA-2017:2858
Red Hat Gluster Storage 3.3 for RHEL 7
samba-0:4.6.3-6.el7rhgs
Fixed · RHSA-2017:2858
Red Hat Enterprise Linux 5
samba
Will not fix
Red Hat Enterprise Linux 5
samba3x
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | samba-0:3.6.23-45.el6_9 | Fixed | RHSA-2017:2789 |
| Red Hat Enterprise Linux 6 | samba4-0:4.2.10-11.el6_9 | Fixed | RHSA-2017:2791 |
| Red Hat Enterprise Linux 7 | samba-0:4.6.2-11.el7_4 | Fixed | RHSA-2017:2790 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | samba-0:4.6.3-6.el6rhs | Fixed | RHSA-2017:2858 |
| Red Hat Gluster Storage 3.3 for RHEL 7 | samba-0:4.6.3-6.el7rhgs | Fixed | RHSA-2017:2858 |
| Red Hat Enterprise Linux 5 | samba | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | samba3x | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
The missing implied signing for 'smb2mount -e', 'smbcacls -e' and 'smbcquotas -e' can be enforced by explicitly using '--signing=required' on the commandline or "client signing = required" in smb.conf.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
AV:N/AC:M/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 13.17% (0.13170) | 96.25th | v5 (v2026.06.15) |
| Jun 15, 2026 | 13.23% (0.13228) | 95.87th | v5 (v2026.06.15) |
| May 29, 2026 | 22.10% (0.22100) | 95.88th | v4 (v2025.03.14) |
| May 24, 2026 | 21.00% (0.21000) | 95.72th | v4 (v2025.03.14) |
| Jan 20, 2026 | 19.63% (0.19625) | 95.23th | v4 (v2025.03.14) |
| Jan 18, 2026 | 23.85% (0.23847) | 95.84th | v4 (v2025.03.14) |
| Nov 30, 2025 | 19.45% (0.19452) | 95.16th | v4 (v2025.03.14) |
| Oct 19, 2025 | 23.95% (0.23949) | 95.76th | v4 (v2025.03.14) |
| Aug 30, 2025 | 19.42% (0.19416) | 95.17th | v4 (v2025.03.14) |
| Jul 12, 2025 | 17.79% (0.17791) | 94.81th | v4 (v2025.03.14) |
| Mar 30, 2025 | 22.35% (0.22350) | 95.33th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.08% (0.08075) | 86.63th | v4 (v2025.03.14) |
| Mar 20, 2025 | 22.35% (0.22350) | 95.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 21.23% (0.21226) | 95.20th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.17% (0.00169) | 55.17th | v3 (v2023.03.01) |
| Jan 26, 2024 | 0.17% (0.00167) | 53.53th | v3 (v2023.03.01) |
| Jul 20, 2023 | 0.20% (0.00196) | 56.50th | v3 (v2023.03.01) |
| Jul 5, 2023 | 0.22% (0.00225) | 59.59th | v3 (v2023.03.01) |
| May 8, 2023 | 0.22% (0.00219) | 58.32th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00365) | 68.05th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.35% (0.03347) | 66.61th | v1 |
| Jan 6, 2022 | 3.35% (0.03347) | 66.29th | v1 |
| Sep 1, 2021 | 3.35% (0.03347) | 81.63th | v1 |
| Apr 14, 2021 | 3.35% (0.03347) | 0.00th | v1 |
References (16)
- http://www.securityfocus.com/bid/100918 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039401 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:2789 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2790 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2791 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2858 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-12150 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1488400 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12150 x_refsource_CONFIRMIssue TrackingMitigationThird Party Advisory
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03775en_us x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-12150
- https://security.netapp.com/advisory/ntap-20170921-0001/ x_refsource_CONFIRMThird Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03817en_us x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2017-12150
- https://www.debian.org/security/2017/dsa-3983 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.samba.org/samba/security/CVE-2017-12150.html x_refsource_CONFIRMPatchVendor Advisory
Change history (0)
No recorded changes yet.