GHSA-vqv5-385r-2hf8
HIGHContrast's unauthenticated recovery allows Coordinator impersonation
Blast Radius
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Description
Impact
Recovering coordinators do not verify the seed provided by the recovering party. This allows an attacker to set up a coordinator with a manifest that passes validation, but with a secret seed controlled by the attacker.
If network traffic is redirected from the legitimate coordinator to the attacker's coordinator, a workload owner is susceptible to impersonation if either
- they
seta new manifest and don't compare the root CA cert with the existing one (this is the default of thecontrastCLI) or - they
verifythe coordinator and don't compare the root CA cert with a trusted reference.
Under these circumstances, the attacker can:
- Issue certificates that chain back to the attacker coordinator's root CA.
- Recover arbitrary workload secrets of workloads deployed after the attack.
This issue does not affect the following:
- secrets of the legitimate coordinator (seed, workload secrets, CA)
- integrity of workloads, even when used with the rogue coordinator
- certificates chaining back to the mesh CA
Patches
This issue is patched in Contrast v1.4.1.
Workarounds
The issue can be avoided by verifying the coordinator root CA cert against expectations.
- At the first
setcall, keep a copy of the CA cert returned by the coordinator. - After subsequent
setorverifycalls, compare the returned CA cert with the backup copy. If it matches bit-for-bit, the coordinator is legitimate.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/edgelesssys/contrast | all versions | 1.4.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/edgelesssys/contrast. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/edgelesssys/contrast to 1.4.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-vqv5-385r-2hf8 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-vqv5-385r-2hf8 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-vqv5-385r-2hf8. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-vqv5-385r-2hf8 in your dependencies?
O3 detects GHSA-vqv5-385r-2hf8 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.