Summary
User data in TPM attestation vulnerable to MITM
Workarounds
none
Impact
Attestation user data (such as the digest of the public key in an aTLS connection) was bound to the issuer's TPM, but not to its PCR state. An attacker could intercept a node initialization, initialize the node themselves, and then impersonate an uninitialized node to the validator. In practice, this meant that a CSP insider with sufficient privileges would have been able to join a node under their control to a Constellation cluster.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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The issue has been patched in v2.5.2.
Frequently Asked Questions
- What is GHSA-R2H5-3HGW-8J34? GHSA-R2H5-3HGW-8J34 is a high-severity security vulnerability in github.com/edgelesssys/constellation/v2 (go), affecting versions <= 2.5.1. It is fixed in 2.5.2.
- Which versions of github.com/edgelesssys/constellation/v2 are affected by GHSA-R2H5-3HGW-8J34? github.com/edgelesssys/constellation/v2 (go) versions <= 2.5.1 is affected.
- Is there a fix for GHSA-R2H5-3HGW-8J34? Yes. GHSA-R2H5-3HGW-8J34 is fixed in 2.5.2. Upgrade to this version or later.
- Is GHSA-R2H5-3HGW-8J34 exploitable, and should I be worried? Whether GHSA-R2H5-3HGW-8J34 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-R2H5-3HGW-8J34 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-R2H5-3HGW-8J34? Upgrade
github.com/edgelesssys/constellation/v2to 2.5.2 or later.