samba: Unprivileged adding of CNAME record causing loop in AD LDAP server
Published Nov 28, 2018
6.5
MEDIUMCVSS 3.0
EPSS 5.19%
Description
A denial of service vulnerability was discovered in Samba's LDAP server before versions 4.7.12, 4.8.7, and 4.9.3. A CNAME loop could lead to infinite recursion in the server. An unprivileged local attacker could create such an entry, leading to denial of service.
Affected products
- Vendor n/a Product Samba Defaultn/a
- Version 4.7.12StatusaffectedConstraints-
- Version 4.8.7StatusaffectedConstraints-
- 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 |
|
Configuration 1
Configuration 2
- 12.04
- 14.04
- 16.04
- 18.04
- 18.10
Configuration 3
- 8.0
- 9.0
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
Red Hat statement
Samba 4 packages distributed with Red Hat Enterprise Linux are built without the AD DC functionality, where this flaw is present. These packages are not affected by this vulnerability.
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
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 2, 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 (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 5.19% (0.05192) | 92.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.19% (0.05192) | 91.37th | v5 (v2026.06.15) |
| Mar 10, 2026 | 9.24% (0.09242) | 92.59th | v4 (v2025.03.14) |
| Dec 28, 2025 | 13.62% (0.13621) | 94.01th | v4 (v2025.03.14) |
| Dec 27, 2025 | 15.19% (0.15187) | 94.41th | v4 (v2025.03.14) |
| Nov 21, 2025 | 13.62% (0.13621) | 93.97th | v4 (v2025.03.14) |
| Nov 18, 2025 | 4.82% (0.04824) | 88.44th | v4 (v2025.03.14) |
| Oct 28, 2025 | 14.06% (0.14065) | 94.04th | v4 (v2025.03.14) |
| Oct 27, 2025 | 15.67% (0.15671) | 94.43th | v4 (v2025.03.14) |
| Oct 1, 2025 | 14.06% (0.14065) | 94.14th | v4 (v2025.03.14) |
| Sep 21, 2025 | 15.67% (0.15671) | 94.48th | v4 (v2025.03.14) |
| Mar 17, 2025 | 10.92% (0.10917) | 92.86th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.25% (0.00253) | 65.66th | v3 (v2023.03.01) |
| Jul 17, 2024 | 0.25% (0.00253) | 65.53th | v3 (v2023.03.01) |
| Apr 20, 2024 | 0.24% (0.00245) | 64.25th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.34% (0.00342) | 70.70th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.34% (0.00342) | 67.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.25% (0.00249) | 60.92th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.38% (0.01379) | 32.02th | v1 |
| Jan 6, 2022 | 1.38% (0.01379) | 31.28th | v1 |
| Sep 1, 2021 | 1.38% (0.01379) | 70.82th | v1 |
| Apr 14, 2021 | 1.38% (0.01379) | 0.00th | v1 |
References (13)
- http://www.securityfocus.com/bid/106022 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-14629 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1625449 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14629 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-14629
- 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://usn.ubuntu.com/3827-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3827-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-14629
- https://www.debian.org/security/2018/dsa-4345 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.samba.org/samba/security/CVE-2018-14629.html x_refsource_CONFIRMPatchVendor Advisory
Change history (0)
No recorded changes yet.