CVE-2016-2123 Integer overflow in samba
An integer overflow in Samba allows authenticated users to trigger memory corruption and escalate privileges via LDAP writes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2016-2123?
CVE-2016-2123 is a high-severity vulnerability in Samba Samba, published on 1 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2016-2123?
It affects 1 product.
Products include Samba Samba.
How do I fix CVE-2016-2123?
Upgrade to a fixed version.
Is CVE-2016-2123 being exploited?
There is no known exploitation of CVE-2016-2123 in the wild and no public exploit code.
Other vulnerabilities in Samba Samba
Sources
Also known as ALPINE-CVE-2016-2123, DEBIAN-CVE-2016-2123, ECHO-66d0-8aed-029e, GHSA-m2v2-w4f9-rmq6, UBUNTU-CVE-2016-2123.