samba: NULL pointer de-reference in Samba AD DC DNS management server
Published Nov 28, 2018
6.5
MEDIUMCVSS 3.0
EPSS 2.23%
Description
Samba from version 4.9.0 and before version 4.9.3 is vulnerable to a NULL pointer de-reference. During the processing of an DNS zone in the DNS management DCE/RPC server, the internal DNS server or the Samba DLZ plugin for BIND9, if the DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS property is set, the server will follow a NULL pointer and terminate. There is no further vulnerability associated with this issue, merely a denial of service.
Affected products
- Vendor n/a Product Samba Defaultn/a
- Version 4.9.3StatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Samba | n/a |
|
No data.
Red Hat Enterprise Linux 5
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 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
Red Hat statement
This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux because there is no support for samba as Active Directory Domain Controller.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/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 v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.23% (0.02227) | 82.10th | v5 (v2026.06.15) |
| Sep 22, 2026 | 2.23% (0.02227) | 81.97th | v5 (v2026.06.15) |
| Sep 21, 2026 | 3.25% (0.03246) | 87.77th | v5 (v2026.06.15) |
| Sep 6, 2026 | 2.23% (0.02227) | 81.58th | v5 (v2026.06.15) |
| Sep 5, 2026 | 3.25% (0.03246) | 87.50th | v5 (v2026.06.15) |
| Aug 30, 2026 | 2.23% (0.02227) | 81.48th | v5 (v2026.06.15) |
| Aug 28, 2026 | 3.25% (0.03246) | 87.42th | v5 (v2026.06.15) |
| Aug 24, 2026 | 2.23% (0.02227) | 81.38th | v5 (v2026.06.15) |
| Aug 23, 2026 | 3.25% (0.03246) | 87.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.23% (0.02227) | 80.36th | v5 (v2026.06.15) |
| Mar 10, 2026 | 2.90% (0.02897) | 86.12th | v4 (v2025.03.14) |
| Nov 21, 2025 | 6.40% (0.06397) | 90.61th | v4 (v2025.03.14) |
| Nov 18, 2025 | 2.42% (0.02418) | 83.78th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.75% (0.06747) | 90.38th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.95% (0.07954) | 86.51th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.75% (0.06747) | 90.59th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.72% (0.00716) | 80.74th | v3 (v2023.03.01) |
| Apr 20, 2024 | 0.72% (0.00716) | 80.32th | v3 (v2023.03.01) |
| Mar 8, 2024 | 0.62% (0.00616) | 78.27th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.43% (0.00435) | 73.93th | v3 (v2023.03.01) |
| Nov 7, 2023 | 0.43% (0.00435) | 71.89th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.34% (0.00338) | 67.72th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.36% (0.00356) | 67.61th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.55% (0.01550) | 33.66th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.55% (0.01550) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/106024 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-16852 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1646386 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16852 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-16852
- https://security.gentoo.org/glsa/202003-52 vendor-advisoryx_refsource_GENTOO
- https://security.netapp.com/advisory/ntap-20181127-0001/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-16852
- https://www.samba.org/samba/security/CVE-2018-16852.html x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/106024 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-16852 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1646386 | Issue Tracking | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16852 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-16852 | ||
| https://security.gentoo.org/glsa/202003-52 | vendor-advisoryx_refsource_GENTOO | |
| https://security.netapp.com/advisory/ntap-20181127-0001/ | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-16852 | ||
| https://www.samba.org/samba/security/CVE-2018-16852.html | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.