Security readout for executives and security teams
CVE-2016-2123 affects Samba 4.0.0 through 4.5.2. A flaw in DNS record parsing can let a remote user with the right LDAP write capability corrupt memory and potentially escalate privileges on a Samba Active Directory deployment. Exposure is most likely on Samba Active Directory Domain Controller deployments running versions 4.0.0 to 4.5.2, especially where authenticated LDAP users can create or modify DNS objects containing dnsRecord attributes. Treat this as a high-priority legacy Samba risk where affected domain controllers remain in service. The issue can affect confidentiality, integrity, and availability, but the provided sources do not prove active exploitation. Mitigation focus: Inventory Samba versions and identify any 4.0.0 through 4.5.2 deployments.; Check Samba and distribution vendor advisories for the supported fixed package path.; Upgrade affected Samba systems to a vendor-supported version outside the affected range..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-122: Exact CWE lookup
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Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupDatabase behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2016-2123 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.samba.org/samba/security/CVE-2016-2123.htmlCVE reference · x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.