samba: NULL pointer dereference in printer server process
Published Mar 13, 2018
4.3
MEDIUMCVSS 3.1
EPSS 6.51%
Description
All versions of Samba from 4.0.0 onwards are vulnerable to a denial of service attack when the RPC spoolss service is configured to be run as an external daemon. Missing input sanitization checks on some of the input parameters to spoolss RPC calls could cause the print spooler service to crash.
Affected products
-
- Version All versions of Samba from 4.0.0 onwardsStatusaffectedConstraints-
- Version
Configuration 1
- 12.04
- 14.04
- 16.04
- 17.10
Configuration 2
Configuration 3
- 7.0
- 8.0
- 9.0
Configuration 4
- 6.0
- 7.0
- 6.0
- 7.0
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
samba-0:3.6.23-51.el6
Fixed · RHSA-2018:1860
Red Hat Enterprise Linux 6
samba4-0:4.2.10-15.el6
Fixed · RHSA-2018:1883
Red Hat Enterprise Linux 7
samba-0:4.8.3-4.el7
Fixed · RHSA-2018:3056
Red Hat Gluster Storage 3.4 for RHEL 6
libtalloc-0:2.1.11-1.el6rhs
Fixed · RHSA-2018:2612
Red Hat Gluster Storage 3.4 for RHEL 6
libtdb-0:1.3.15-4.el6rhs
Fixed · RHSA-2018:2612
Red Hat Gluster Storage 3.4 for RHEL 6
libtevent-0:0.9.35-1.el6rhs
Fixed · RHSA-2018:2612
Red Hat Gluster Storage 3.4 for RHEL 6
samba-0:4.7.5-110.el6rhs
Fixed · RHSA-2018:2612
Red Hat Gluster Storage 3.4 for RHEL 7
libtalloc-0:2.1.11-1.el7rhgs
Fixed · RHSA-2018:2613
Red Hat Gluster Storage 3.4 for RHEL 7
libtdb-0:1.3.15-4.el7rhgs
Fixed · RHSA-2018:2613
Red Hat Gluster Storage 3.4 for RHEL 7
libtevent-0:0.9.35-1.el7rhgs
Fixed · RHSA-2018:2613
Red Hat Gluster Storage 3.4 for RHEL 7
samba-0:4.7.5-110.el7rhgs
Fixed · RHSA-2018:2613
Red Hat Enterprise Linux 5
samba
Not affected
Red Hat Enterprise Linux 5
samba3x
Not affected
Red Hat Enterprise Linux 8
samba
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | samba-0:3.6.23-51.el6 | Fixed | RHSA-2018:1860 |
| Red Hat Enterprise Linux 6 | samba4-0:4.2.10-15.el6 | Fixed | RHSA-2018:1883 |
| Red Hat Enterprise Linux 7 | samba-0:4.8.3-4.el7 | Fixed | RHSA-2018:3056 |
| Red Hat Gluster Storage 3.4 for RHEL 6 | libtalloc-0:2.1.11-1.el6rhs | Fixed | RHSA-2018:2612 |
| Red Hat Gluster Storage 3.4 for RHEL 6 | libtdb-0:1.3.15-4.el6rhs | Fixed | RHSA-2018:2612 |
| Red Hat Gluster Storage 3.4 for RHEL 6 | libtevent-0:0.9.35-1.el6rhs | Fixed | RHSA-2018:2612 |
| Red Hat Gluster Storage 3.4 for RHEL 6 | samba-0:4.7.5-110.el6rhs | Fixed | RHSA-2018:2612 |
| Red Hat Gluster Storage 3.4 for RHEL 7 | libtalloc-0:2.1.11-1.el7rhgs | Fixed | RHSA-2018:2613 |
| Red Hat Gluster Storage 3.4 for RHEL 7 | libtdb-0:1.3.15-4.el7rhgs | Fixed | RHSA-2018:2613 |
| Red Hat Gluster Storage 3.4 for RHEL 7 | libtevent-0:0.9.35-1.el7rhgs | Fixed | RHSA-2018:2613 |
| Red Hat Gluster Storage 3.4 for RHEL 7 | samba-0:4.7.5-110.el7rhgs | Fixed | RHSA-2018:2613 |
| Red Hat Enterprise Linux 5 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 5 | samba3x | Not affected | n/a |
| Red Hat Enterprise Linux 8 | samba | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
Ensure the paramter: rpc_server:spoolss = external is not set in the [global] section of your smb.conf.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AV:A/AC:L/Au:N/C:N/I:N/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 (29 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.51% (0.06515) | 93.57th | v5 (v2026.06.15) |
| Jun 15, 2026 | 6.69% (0.06691) | 93.03th | v5 (v2026.06.15) |
| May 13, 2026 | 19.65% (0.19654) | 95.48th | v4 (v2025.03.14) |
| Mar 15, 2026 | 22.36% (0.22357) | 95.72th | v4 (v2025.03.14) |
| Jan 27, 2026 | 25.96% (0.25959) | 96.13th | v4 (v2025.03.14) |
| Dec 28, 2025 | 27.18% (0.27175) | 96.22th | v4 (v2025.03.14) |
| Dec 27, 2025 | 24.11% (0.24110) | 95.89th | v4 (v2025.03.14) |
| Nov 21, 2025 | 27.18% (0.27175) | 96.19th | v4 (v2025.03.14) |
| Nov 18, 2025 | 8.32% (0.08317) | 91.39th | v4 (v2025.03.14) |
| Oct 28, 2025 | 27.18% (0.27175) | 96.15th | v4 (v2025.03.14) |
| Oct 27, 2025 | 24.11% (0.24110) | 95.82th | v4 (v2025.03.14) |
| Oct 1, 2025 | 27.18% (0.27175) | 96.24th | v4 (v2025.03.14) |
| Jul 3, 2025 | 24.11% (0.24110) | 95.82th | v4 (v2025.03.14) |
| Mar 30, 2025 | 25.55% (0.25546) | 95.77th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.46% (0.09464) | 87.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 25.63% (0.25630) | 95.78th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.41% (0.02410) | 90.31th | v3 (v2023.03.01) |
| Jun 16, 2024 | 2.48% (0.02475) | 90.13th | v3 (v2023.03.01) |
| Sep 13, 2023 | 2.74% (0.02741) | 89.26th | v3 (v2023.03.01) |
| Aug 4, 2023 | 2.64% (0.02644) | 88.97th | v3 (v2023.03.01) |
| Jul 8, 2023 | 3.18% (0.03178) | 89.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 37.88% (0.37877) | 96.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.79% (0.04787) | 77.97th | v1 |
| Jan 6, 2022 | 4.79% (0.04787) | 77.75th | v1 |
| Sep 1, 2021 | 4.79% (0.04787) | 87.16th | v1 |
| Apr 14, 2021 | 4.79% (0.04787) | 0.00th | v1 |
References (21)
- http://www.securityfocus.com/bid/103387 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040493 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:1860 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1883 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2612 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2613 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3056 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-1050 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1538771 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 x_refsource_CONFIRMThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00024.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00013.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-1050
- https://security.gentoo.org/glsa/201805-07 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.netapp.com/advisory/ntap-20180313-0001/ x_refsource_CONFIRMThird Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03834en_us x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/3595-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3595-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-1050
- https://www.debian.org/security/2018/dsa-4135 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.samba.org/samba/security/CVE-2018-1050.html x_refsource_CONFIRMMitigationVendor Advisory
Change history (0)
No recorded changes yet.