Analyst readout for executives and security teams
Plain-English summary
This Samba issue can let a delegated Active Directory administrator keep broad control over attributes on a computer object they create. Sensitive attributes may remain writable after creation because creator-owner rights are retained. That can create unintended privilege escalation risk in Samba AD environments using delegated object creation.
Executive priority
Prioritize review where Samba is used as an Active Directory domain controller with delegated administration. This is high severity but not shown as actively exploited in the provided sources. Treat it as an access-control governance issue requiring vendor-status confirmation and delegated-rights review.
Technical view
The flaw involves LDAP adds of computer objects in Samba Active Directory. During creation, missing ACL enforcement means the delegated creator can write all attributes, including security-sensitive ones, and later remains recognized as creator owner. CVSS 3.1 is 7.5 high, with low privileges required but high attack complexity.
Likely exposure
Likely exposure is Samba Active Directory deployments that delegate permission to create computer or directory objects. The source bundle does not identify exact vulnerable Samba versions. Red Hat-listed products in the bundle are marked unaffected, so confirm local vendor package status.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation would require an authenticated delegated administrator and suitable directory permissions, not anonymous access. Impact could include confidentiality, integrity, and availability compromise if sensitive attributes are abused.
Researcher notes
Evidence is incomplete for exact affected upstream versions and remediation details. The core weakness is improper handling of creator-owner rights and attribute access checks during LDAP object creation. Avoid assuming Red Hat exposure because the provided Red Hat statuses are unaffected.
Mitigation direction
- Check Samba and operating-system vendor guidance for affected versions and fixes.
- Review who can create computer objects in Samba Active Directory.
- Reduce delegated object-creation rights to the minimum needed.
- Audit sensitive attribute writes on newly created directory objects.
- Confirm Red Hat package status against local installed versions.
Validation and detection
- Inventory Samba Active Directory domain controllers and their package versions.
- List delegated administrators with rights to create computer objects.
- Review ACLs and ownership behavior for newly created computer objects.
- Check logs for sensitive attribute changes by delegated creators.
- Verify whether your vendor marks the installed package affected.
Public sources used
Based on public source material and reviewed before publication.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-266: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
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 lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-25720 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H1.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2020-25720CVE reference · vdb-entry, x_refsource_REDHAT
- RHBZ#2305954CVE reference · issue-tracking, x_refsource_REDHAT
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.
Incorrect Privilege Assignment
Incorrect Privilege Assignment represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.