Is CVE-2016-2123 in the CISA KEV catalog?

No. CVE-2016-2123 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-2123?

CVE-2016-2123 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2016-2123?

CVE-2016-2123 has an EPSS score of 6.23% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-2123?

Upgrade samba on debian 11 to 2:4.5.2+dfsg-2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2016-2123

HIGHEPSS 93th pctl

8.8

CVSS v3

NVD

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.

CWE-122Heap-based Buffer Overflow CWE-119Buffer Overflow

How to fix

Remediation Available

sambaDebian

Fixed in:2:4.5.2+dfsg-2CVE-2016-2123

libsmbclientUbuntu

Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.4USN-3158-1

Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.3USN-3158-1

sambaUbuntu

Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.4USN-3158-1

Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.3USN-3158-1

winbindUbuntu

Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.4USN-3158-1

Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.3USN-3158-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

6.23%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch1

samba.org

Third-Party Advisory2

Issue Tracking1

bugzilla.redhat.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.