CVE-2025-22246: Cloud Foundry UAA Private Key Exposure

CVE-2025-22246 Overview

Cloud Foundry User Account and Authentication (UAA) release versions from v77.21.0 to v7.31.0 expose a private key in log files. The flaw is tracked as CWE-532: Insertion of Sensitive Information into Log File. Attackers with access to UAA logs can recover cryptographic material used by the identity service. The vulnerability affects cloudfoundry:uaa_release and downstream cloudfoundry:cf-deployment installations.

Critical Impact
Exposure of a UAA private key in logs allows attackers who obtain log data to compromise the confidentiality of tokens, sessions, and identity assertions issued by the affected Cloud Foundry deployment.

Affected Products

Cloud Foundry UAA release versions v77.21.0 through v7.31.0
Cloud Foundry cf-deployment bundles including the affected UAA release
Downstream distributions packaging vulnerable UAA versions

Discovery Timeline

2025-05-13 - CVE-2025-22246 published to NVD
2025-07-11 - Last updated in NVD database

Technical Details for CVE-2025-22246

Vulnerability Analysis

The vulnerability is an information disclosure flaw classified under [CWE-532]. The UAA component, which issues OAuth 2.0 tokens and handles authentication for Cloud Foundry, writes a private key into log output during normal operation. Any operator, log aggregator, or attacker with read access to UAA logs can retrieve the key material.

The attack vector is network-adjacent in the sense that logs frequently leave the host through centralized logging pipelines such as syslog, Fluentd, or Loggregator. Once the key is captured, the integrity of identity assertions signed or protected by that key is broken across the deployment. The Cloud Foundry advisory documents the affected range and the patched releases. See the Cloud Foundry security advisory for vendor guidance.

Root Cause

The root cause is improper handling of sensitive data in logging routines within UAA. A code path that processes cryptographic material serializes the private key into a log statement rather than redacting or omitting it. Standard log-level configuration does not suppress the output, so the key appears in production logs.

Attack Vector

An attacker requires read access to UAA log streams or log storage. This includes administrators of centralized SIEM and log archives, third parties with backup access, and insiders. Once retrieved, the key can be used offline to forge or decrypt material that the UAA private key protects, undermining authentication trust in the platform.

No public proof-of-concept is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2025-22246

Indicators of Compromise

Presence of PEM-formatted blocks such as -----BEGIN PRIVATE KEY----- or -----BEGIN RSA PRIVATE KEY----- in UAA log files or aggregated log indices.
UAA log entries containing base64-encoded key material associated with signing or encryption operations.
Access to log archives or SIEM indices containing UAA logs from accounts that do not require platform telemetry.

Detection Strategies

Run pattern searches across log archives for PEM headers, JSON Web Key (JWK) fragments, and known UAA key identifiers.
Compare deployed UAA release versions against the affected range v77.21.0 to v7.31.0 using BOSH or cf-deployment manifests.
Audit log forwarders, S3 buckets, and SIEM retention tiers for any UAA log content predating remediation.

Monitoring Recommendations

Enable continuous secret scanning on log pipelines and object storage holding Cloud Foundry telemetry.
Alert on outbound access to UAA endpoints from credentials or tokens that have not been rotated after suspected exposure.
Monitor BOSH deployment events to confirm operators have rolled out the patched UAA release across all environments.

How to Mitigate CVE-2025-22246

Immediate Actions Required

Upgrade UAA to a fixed release as identified in the Cloud Foundry security advisory.
Rotate the UAA signing and encryption keys, then re-issue dependent tokens and trust material.
Purge or restrict access to historical UAA logs that may contain the exposed key.
Review log aggregation destinations and revoke unnecessary read access.

Patch Information

Cloud Foundry has published fixed UAA releases that remove the private key from log output. Operators should update cf-deployment manifests to reference the patched UAA release and redeploy through BOSH. Refer to the Cloud Foundry advisory for the exact patched version and upgrade steps.

Workarounds

Restrict file system and SIEM access to UAA logs to a minimal set of operators until patching completes.
Filter UAA log streams through a redaction proxy that strips PEM blocks and JWK fragments before forwarding.
Shorten log retention for affected UAA components to reduce the exposure window.

bash

# Example log redaction filter for UAA log streams
# Strip PEM-formatted private key blocks before forwarding
sed -E '/-----BEGIN (RSA |EC |DSA |OPENSSH |ENCRYPTED |)PRIVATE KEY-----/,/-----END (RSA |EC |DSA |OPENSSH |ENCRYPTED |)PRIVATE KEY-----/d' \
  /var/vcap/sys/log/uaa/uaa.log > /var/vcap/sys/log/uaa/uaa.redacted.log