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Samba CVE-2016-2123: Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer Overflow Remote Code Execution Vulnerability

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Samba CVE-2016-2123: Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer Overflow Remote Code Execution Vulnerability

Severity
7
CVSS
(AV:N/AC:L/Au:S/C:P/I:P/A:P)
Published
12/20/2016
Created
07/25/2018
Added
12/20/2016
Modified
01/30/2019

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.

Solution(s)

  • samba-upgrade-4_3_13
  • samba-upgrade-4_4_8
  • samba-upgrade-4_5_3

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