CVE-2016-2123

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

A flaw was found in samba versions 4.0.0 to 4.5.2. The Samba routine ndr_pull_dnsp_name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects. This makes the defect a remote privilege escalation.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122 CWE-119

Affected software

Vendor	Product	Versions
[UNKNOWN]	samba	versions 4.0.0 to 4.5.2

References

http://www.securityfocus.com/bid/94970Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037493Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123Issue Tracking
https://www.samba.org/samba/security/CVE-2016-2123.htmlPatch, Vendor Advisory
http://www.securityfocus.com/bid/94970Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037493Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123Issue Tracking
https://www.samba.org/samba/security/CVE-2016-2123.htmlPatch, Vendor Advisory

Timeline

Published: Nov 1, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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