GHSA-fq33-vmhv-48xh — ntru
GHSA-fq33-vmhv-48xh is a remote code execution vulnerability in ntru. No vendor fix is recorded yet; mitigation options are listed below.
ntru-rs has unsound FFI: Wrong API usage causes write past allocated area
Real-World Exposure
ntruReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.
Description
The following usage causes undefined behavior.
let kp: ntru::types::KeyPair = …;
kp.get_public().export(Default::default())
When compiled with debug assertions, the code above will trigger a attempt to subtract with overflow panic before UB occurs.
Other mistakes (e.g. using EncParams from a different key) may always trigger UB.
Likely, older versions of this crate are also affected, but have not been tested.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🦀crates.io | ntru | ≥ 0.4.3 | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ntru, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of ntru has shipped for GHSA-fq33-vmhv-48xh yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-fq33-vmhv-48xh can be triaged on real exposure rather than presence alone.
Tailored to GHSA-fq33-vmhv-48xh. 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-fq33-vmhv-48xh in your dependencies?
O3 Security finds GHSA-fq33-vmhv-48xh across crates.io dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.