CVE-2018-14629

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-11-28 · updated 2026-06-17
Weakness: CWE-400

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

Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04, 18.10
Debian Linux: 8.0, 9.0
Samba: from 4.0.0 before 4.7.12; from 4.8.0 before 4.8.7; from 4.8.8 before 4.9.3 — fixed in 4.7.12, 4.8.7, 4.9.3

How to fix

Upgrade to a fixed version: Samba 4.7.12, 4.8.7, 4.9.3. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/106022
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14629
https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html
https://security.gentoo.org/glsa/202003-52
https://security.netapp.com/advisory/ntap-20181127-0001/
https://usn.ubuntu.com/3827-1/
https://usn.ubuntu.com/3827-2/
https://www.debian.org/security/2018/dsa-4345
https://www.samba.org/samba/security/CVE-2018-14629.html
http://www.securityfocus.com/bid/106022
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14629
https://lists.debian.org/debian-lts-announce/2018/12/msg00005.html

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