Authentication bypass via unvalidated AWS ALB signer
Published Feb 12, 2025 · Updated Feb 12, 2025
Authentication bypass in GCHQ Stroom allows remote attackers to gain application access via crafted AWS ALB identity data. The ALB authentication path trusts the x-amzn-oidc-data identity assertion without validating that its signer matches the configured load balancer. The system must use ALB Authentication integration and remain directly network-accessible outside the ALB; the bypass can expose Stroom functions and permit requests to the AWS metadata service, leading to code execution or privilege escalation.
Summary
What happened
Authentication bypass in GCHQ Stroom allows remote attackers to gain application access via crafted AWS ALB identity data. The ALB authentication path trusts the x-amzn-oidc-data identity assertion without validating that its signer matches the configured load balancer. The system must use ALB Authentication integration and remain directly network-accessible outside the ALB; the bypass can expose Stroom functions and permit requests to the AWS metadata service, leading to code execution or privilege escalation.
The record
- CVE
- CVE-2025-25182
- Published
- Feb 12, 2025
- Updated
- Feb 12, 2025
- Vendor
- GCHQ
- Product
- Stroom
- Classifications
- CWE-290, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 12, 2025CVE publishedPublication date reported by the CVE source.
- Feb 12, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 7.2-beta.53, < 7.2.24
- Affected versionversion=>= 7.3-beta.1, < 7.3-beta.22
- Affected versionversion=>= 7.4-beta.1, < 7.4.4
- Affected versionversion== 7.5-beta.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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