samba: Use-after-free in processing SMB1 requests
Published Nov 27, 2017
9.8
CRITICALCVSS 3.1
EPSS 9.88%
Description
Use-after-free vulnerability in Samba 4.x before 4.7.3 allows remote attackers to execute arbitrary code via a crafted SMB1 request.
Affected products
No data.
Configuration 1
Configuration 2
- 14.04
- 16.04
- 17.04
- 17.10
- 8.0
- 9.0
- 6.0
- 7.0
- 6.0
- 7.0
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
samba4-0:4.2.10-12.el6_9
Fixed · RHSA-2017:3278
Red Hat Enterprise Linux 7
samba-0:4.6.2-12.el7_4
Fixed · RHSA-2017:3260
Red Hat Gluster Storage 3.3 for RHEL 6
samba-0:4.6.3-9.el6rhs
Fixed · RHSA-2017:3261
Red Hat Gluster Storage 3.3 for RHEL 7
samba-0:4.6.3-9.el7rhgs
Fixed · RHSA-2017:3261
Red Hat Enterprise Linux 5
samba
Not affected
Red Hat Enterprise Linux 6
samba
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | samba4-0:4.2.10-12.el6_9 | Fixed | RHSA-2017:3278 |
| Red Hat Enterprise Linux 7 | samba-0:4.6.2-12.el7_4 | Fixed | RHSA-2017:3260 |
| Red Hat Gluster Storage 3.3 for RHEL 6 | samba-0:4.6.3-9.el6rhs | Fixed | RHSA-2017:3261 |
| Red Hat Gluster Storage 3.3 for RHEL 7 | samba-0:4.6.3-9.el7rhgs | Fixed | RHSA-2017:3261 |
| Red Hat Enterprise Linux 5 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Prevent SMB1 access to the server by setting the parameter: "server min protocol = SMB2" to the [global] section of your smb.conf and restart smbd. This prevents and SMB1 access to the server. Note this could cause older clients to be unable to connect to the server.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 (32 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 9.88% (0.09876) | 95.43th | v5 (v2026.06.15) |
| Jun 15, 2026 | 9.88% (0.09876) | 94.94th | v5 (v2026.06.15) |
| Apr 11, 2026 | 31.25% (0.31253) | 96.76th | v4 (v2025.03.14) |
| Apr 9, 2026 | 32.89% (0.32893) | 96.88th | v4 (v2025.03.14) |
| Mar 10, 2026 | 42.99% (0.42986) | 97.42th | v4 (v2025.03.14) |
| Jan 1, 2026 | 41.22% (0.41219) | 97.28th | v4 (v2025.03.14) |
| Dec 4, 2025 | 39.46% (0.39458) | 97.12th | v4 (v2025.03.14) |
| Oct 19, 2025 | 41.21% (0.41214) | 97.21th | v4 (v2025.03.14) |
| Aug 17, 2025 | 28.33% (0.28330) | 96.32th | v4 (v2025.03.14) |
| Jul 20, 2025 | 31.25% (0.31253) | 96.55th | v4 (v2025.03.14) |
| Jun 13, 2025 | 36.71% (0.36709) | 96.93th | v4 (v2025.03.14) |
| Mar 20, 2025 | 37.81% (0.37808) | 96.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 48.09% (0.48086) | 97.45th | v4 (v2025.03.14) |
| Jan 19, 2025 | 40.24% (0.40241) | 97.34th | v3 (v2023.03.01) |
| Dec 17, 2024 | 45.17% (0.45168) | 97.47th | v3 (v2023.03.01) |
| Jan 23, 2024 | 77.32% (0.77321) | 97.95th | v3 (v2023.03.01) |
| Nov 7, 2023 | 81.54% (0.81539) | 98.00th | v3 (v2023.03.01) |
| Oct 7, 2023 | 77.32% (0.77321) | 97.85th | v3 (v2023.03.01) |
| Jun 23, 2023 | 81.54% (0.81539) | 97.87th | v3 (v2023.03.01) |
| May 30, 2023 | 83.98% (0.83981) | 97.94th | v3 (v2023.03.01) |
| May 11, 2023 | 88.26% (0.88262) | 98.14th | v3 (v2023.03.01) |
| Apr 20, 2023 | 89.91% (0.89908) | 98.22th | v3 (v2023.03.01) |
| Mar 8, 2023 | 91.43% (0.91434) | 98.29th | v3 (v2023.03.01) |
| Mar 7, 2023 | 93.74% (0.93743) | 98.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 15.47% (0.15468) | 96.00th | v2 (v2022.01.01) |
| Aug 24, 2022 | 15.47% (0.15468) | 95.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 15.10% (0.15104) | 95.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 15.10% (0.15104) | 91.31th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.33% (0.05330) | 78.84th | v1 |
| Jan 6, 2022 | 5.33% (0.05330) | 78.63th | v1 |
| Sep 1, 2021 | 5.33% (0.05330) | 88.23th | v1 |
| Apr 14, 2021 | 5.33% (0.05330) | 0.00th | v1 |
References (15)
- http://www.securityfocus.com/bid/101907 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039856 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-3486-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3260 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3261 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3278 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-14746 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1511899 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-14746
- https://security.gentoo.org/glsa/201805-07 vendor-advisoryx_refsource_GENTOOThird 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-2017-14746
- https://www.debian.org/security/2017/dsa-4043 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.samba.org/samba/security/CVE-2017-14746.html x_refsource_CONFIRMIssue TrackingVendor Advisory
- https://www.synology.com/support/security/Synology_SA_17_72_Samba x_refsource_CONFIRMThird Party Advisory
Change history (0)
No recorded changes yet.