GHSA-5v93-9mqw-p9mh
Uncaught Panic in ORML Rewards Pallet
Blast Radius
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Description
Summary
A vulnerability in the add_share function of the Rewards pallet (part of the ORML repository) can lead to an uncaught Rust panic when handling user-provided input exceeding the u128 range.
Affected Components
- ORML Rewards pallet (
rewards/src/lib.rs) - Any Substrate-based chain using ORML Rewards with
add_shareaccepting unvalidated largeu128inputs
Technical Details
add_shareperforms arithmetic on user-supplied values (add_amount) of typeT::Share(mapped tou128in Acala).- If
add_amountis large enough (e.g.,i128::MAX), the intermediate result may overflow and panic on the cast tou128. - Validation occurs only after arithmetic, enabling a crafted input to trigger an overflow.
Impact
A malicious user submitting a specially crafted extrinsic can cause a panic in the runtime:
- Denial of Service by crashing the node process.
- Potential for invalid blocks produced by validators.
Likelihood
This issue is exploitable in production if there exists at least one rewards pool where reward tokens exceed twice the collateral tokens, allowing sufficiently large multiplication to exceed u128 bounds.
Remediation
- This issue is fixed in https://github.com/open-web3-stack/open-runtime-module-library/pull/1016
Backport
The patch have been backported to following release branches:
- polkadot-stable2407
- polkadot-stable2409
A 1.0.1 patch release is made with this fix.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | orml-rewards | all versions | 1.2.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for orml-rewards. 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 orml-rewards to 1.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5v93-9mqw-p9mh 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-5v93-9mqw-p9mh 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-5v93-9mqw-p9mh. 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-5v93-9mqw-p9mh in your dependencies?
O3 detects GHSA-5v93-9mqw-p9mh across crates.io dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.