CVE-2016-2123
8.8
HIGH
CVSS 3.1
EPSS 0.86%
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.
How to fix CVE-2016-2123
To remediate CVE-2016-2123, upgrade the affected package to a fixed version below.
- —upgrade to 4.2.14-r1 or later
- —upgrade to 2:4.5.2+dfsg-2 or later
Is CVE-2016-2123 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.2.14-r1
- from 0, < 2:4.5.2+dfsg-2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |