CVE-2018-1264
📋 TL;DR
Cloud Foundry Log Cache versions before 1.1.1 log the UAA client secret during startup, exposing sensitive credentials. An attacker with VM access can read this secret and gain the privileges of the Log Cache UAA client, potentially obtaining admin control over the entire Cloud Foundry Foundation. This affects all deployments using vulnerable Log Cache versions.
💻 Affected Systems
- Cloud Foundry Log Cache
📦 What is this software?
Cloud Foundry Log Cache by Pivotal Software
⚠️ Risk & Real-World Impact
Worst Case
Complete administrative control over the Cloud Foundry Foundation if the Log Cache UAA client has admin privileges, allowing full system compromise.
Likely Case
Unauthorized access to Log Cache functionality and potential privilege escalation within the Cloud Foundry environment.
If Mitigated
Limited impact if proper access controls prevent unauthorized VM access and client privileges are minimized.
🎯 Exploit Status
Exploitation requires access to the Log Cache VM to read startup logs containing the secret.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.1
Vendor Advisory: https://www.cloudfoundry.org/blog/cve-2018-1264/
Restart Required: Yes
Instructions:
1. Upgrade Log Cache to version 1.1.1 or later. 2. Restart Log Cache services. 3. Verify the fix by checking logs no longer contain UAA client secrets.
🔧 Temporary Workarounds
Log Redaction
allManually configure log redaction to exclude sensitive environment variables from startup logs.
Configure log filtering to exclude UAA_CLIENT_SECRET from envstruct reports
Access Restriction
allTighten VM access controls to prevent unauthorized access to Log Cache instances.
Implement strict SSH/key-based access controls
Use network segmentation to isolate Log Cache VMs
🧯 If You Can't Patch
- Rotate UAA client secrets immediately to invalidate exposed credentials.
- Implement strict access controls and monitoring on Log Cache VMs to detect unauthorized access.
🔍 How to Verify
Check if Vulnerable:
Check Log Cache startup logs for UAA_CLIENT_SECRET entries. If present in plaintext, the system is vulnerable.Check Version:
cf curl /v2/info | grep "log_cache_version" or check deployment manifestVerify Fix Applied:
Verify Log Cache version is 1.1.1 or later and that startup logs no longer contain UAA client secrets.📡 Detection & Monitoring
Log Indicators:
- UAA_CLIENT_SECRET appearing in plaintext in Log Cache startup logs
- Unauthorized UAA client authentication attempts
Network Indicators:
- Unusual authentication patterns from Log Cache IP addresses
SIEM Query:
source="log-cache*" AND "UAA_CLIENT_SECRET"