samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
Published Aug 22, 2018
6.5
MEDIUMCVSS 3.0
EPSS 2.55%
Description
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
Affected products
-
- Version 4.7.9StatusaffectedConstraints-
- Version 4.8.4StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| The Samba Team | Samba | n/a |
|
Configuration 1
- 14.04
- 16.04
- 18.04
No data.
Red Hat Enterprise Linux 5
samba
Not affected
Red Hat Enterprise Linux 5
samba3x
Not affected
Red Hat Enterprise Linux 6
samba
Not affected
Red Hat Enterprise Linux 6
samba4
Not affected
Red Hat Enterprise Linux 7
samba
Not affected
Red Hat Enterprise Linux 8
samba
Not affected
Red Hat Storage 3
samba
Not affected
Red Hat Virtualization 4
samba
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 5 | samba3x | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 6 | samba4 | Not affected | n/a |
| Red Hat Enterprise Linux 7 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 8 | samba | Not affected | n/a |
| Red Hat Storage 3 | samba | Not affected | n/a |
| Red Hat Virtualization 4 | samba | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:S/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 (25 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.55% (0.02546) | 84.45th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.55% (0.02546) | 82.91th | v5 (v2026.06.15) |
| Nov 30, 2025 | 4.35% (0.04347) | 88.49th | v4 (v2025.03.14) |
| Oct 28, 2025 | 5.47% (0.05472) | 89.74th | v4 (v2025.03.14) |
| Oct 27, 2025 | 6.67% (0.06666) | 90.83th | v4 (v2025.03.14) |
| Oct 19, 2025 | 5.47% (0.05472) | 89.71th | v4 (v2025.03.14) |
| Jun 19, 2025 | 3.91% (0.03911) | 87.77th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.84% (0.02843) | 84.97th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.10% (0.07102) | 85.54th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.08% (0.03078) | 85.85th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.45% (0.00450) | 75.91th | v3 (v2023.03.01) |
| Feb 21, 2024 | 0.45% (0.00450) | 74.39th | v3 (v2023.03.01) |
| Jan 13, 2024 | 0.45% (0.00450) | 72.39th | v3 (v2023.03.01) |
| Aug 16, 2023 | 0.39% (0.00387) | 69.76th | v3 (v2023.03.01) |
| Aug 1, 2023 | 0.44% (0.00443) | 71.53th | v3 (v2023.03.01) |
| Apr 7, 2023 | 0.47% (0.00473) | 72.00th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.49% (0.00492) | 72.46th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.45% (0.01454) | 32.67th | v1 |
| Jan 6, 2022 | 1.45% (0.01454) | 31.96th | v1 |
| Sep 1, 2021 | 1.45% (0.01454) | 71.88th | v1 |
| Apr 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
References (10)
- http://www.securityfocus.com/bid/105083 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-10918 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1610640 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10918 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-10918
- https://security.gentoo.org/glsa/202003-52 vendor-advisoryx_refsource_GENTOO
- https://security.netapp.com/advisory/ntap-20180814-0001/ x_refsource_CONFIRMThird Party Advisory
- https://usn.ubuntu.com/3738-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-10918
- https://www.samba.org/samba/security/CVE-2018-10918.html x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105083 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-10918 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1610640 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10918 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-10918 | ||
| https://security.gentoo.org/glsa/202003-52 | vendor-advisoryx_refsource_GENTOO | |
| https://security.netapp.com/advisory/ntap-20180814-0001/ | x_refsource_CONFIRMThird Party Advisory | |
| https://usn.ubuntu.com/3738-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-10918 | ||
| https://www.samba.org/samba/security/CVE-2018-10918.html | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.