CVE-2025-52477
📋 TL;DR
Octo-STS versions before v0.5.3 are vulnerable to unauthenticated server-side request forgery (SSRF) via malicious OpenID Connect tokens. Attackers can trigger internal network requests that reflect error logs containing sensitive information. This affects all Octo-STS deployments using vulnerable versions.
💻 Affected Systems
- Octo-STS
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data from error logs, and potentially pivot to other internal systems.
Likely Case
Information disclosure through error logs containing internal network details and potentially sensitive data.
If Mitigated
Limited impact with proper network segmentation and logging controls, but still exposes internal network information.
🎯 Exploit Status
The advisory describes the vulnerability mechanism but no public exploit code is available. Exploitation requires crafting malicious OpenID Connect tokens.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.5.3
Vendor Advisory: https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq
Restart Required: Yes
Instructions:
1. Update Octo-STS to version v0.5.3 or later. 2. Restart the Octo-STS service. 3. Verify the update was successful.
🔧 Temporary Workarounds
Disable Octo-STS
linuxTemporarily disable the Octo-STS service until patching is possible.
systemctl stop octo-sts
systemctl disable octo-sts
Network Segmentation
allRestrict Octo-STS network access to prevent SSRF attacks from reaching internal systems.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Octo-STS from sensitive internal systems
- Disable or redact detailed error logging to prevent information disclosure
🔍 How to Verify
Check if Vulnerable:
Check the Octo-STS version. If it's below v0.5.3, the system is vulnerable.Check Version:
octo-sts --versionVerify Fix Applied:
Verify the Octo-STS version is v0.5.3 or later and test with known malicious tokens to ensure no SSRF occurs.📡 Detection & Monitoring
Log Indicators:
- Unexpected internal network requests from Octo-STS
- Error logs containing internal IP addresses or service information
- Failed authentication attempts with malformed OpenID tokens
Network Indicators:
- Outbound requests from Octo-STS to internal services not normally accessed
- Unusual traffic patterns from Octo-STS to internal network segments
SIEM Query:
source="octo-sts" AND (url="*internal*" OR error="*network*" OR token="*malformed*")🔗 References
- https://github.com/octo-sts/app/commit/0f177fde54f9318e33f0bba6abaea9463a7c3afd
- https://github.com/octo-sts/app/commit/b3976e39bd8c8c217c0670747d34a4499043da92
- https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq
- https://github.com/octo-sts/app/security/advisories/GHSA-h3qp-hwvr-9xcq
