Security readout for executives and security teams
Plain-English summary
CVE-2017-4991 is an authorization boundary flaw in Cloud Foundry UAA. A privileged user in one identity zone could reset passwords for users in another zone. That weakens tenant or zone isolation and could enable account takeover across administrative boundaries if vulnerable UAA versions remain deployed.
Executive priority
Prioritize remediation for Cloud Foundry environments with multiple UAA zones or delegated administrators. The issue can undermine separation between organizational boundaries, but available sources do not show active exploitation.
Technical view
Affected Cloud Foundry cf-release, UAA release, and uaa-release versions allowed privileged users from one zone to perform password resets in another zone. The source bundle provides fixed version thresholds but no CVSS, CWE, exploit details, or workaround beyond upgrading.
Likely exposure
Exposure is most likely in older Cloud Foundry deployments using UAA identity zones and versions below the fixed releases. Single-zone deployments may have less practical exposure, but version confirmation is required.
Exploitation context
The provided sources do not indicate active exploitation, public exploit code, or CISA KEV listing. Abuse requires a privileged user in one zone, so this is primarily an insider, compromised-admin, or delegated-admin risk.
Researcher notes
Key missing evidence includes CVSS, CWE classification, detailed root cause, and exploit telemetry. Validation should focus on version state, zone configuration, administrative scope boundaries, and historical cross-zone password reset events.
Mitigation direction
- Upgrade cf-release to v260 or later where applicable.
- Upgrade UAA release to v2.7.4.16, v3.6.10, v3.9.12, v3.17.0, or later as applicable.
- Upgrade uaa-release to v13.14, v24.9, v30.2, v36, or later as applicable.
- Check current Cloud Foundry vendor guidance before applying environment-specific remediation.
- Review privileged UAA administrator assignments across identity zones.
Validation and detection
- Inventory cf-release, UAA release, and uaa-release versions in every foundation.
- Confirm whether UAA identity zones are enabled and used for tenant separation.
- Verify deployed versions meet or exceed the fixed thresholds listed in the advisory.
- Review UAA audit logs for password resets affecting users in other zones.
- Confirm privileged accounts are scoped only to intended zones.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-4991 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cloudfoundry.org/cve-2017-4991/CVE 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.