Vulnerability Description
An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.
CVSS Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Parity | Libsecp256K1 | < 0.5.0 |
Related Weaknesses (CWE)
References
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/libsecp256k1/RThird Party Advisory
- https://rustsec.org/advisories/RUSTSEC-2021-0076.htmlExploitIssue TrackingPatch
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/libsecp256k1/RThird Party Advisory
- https://rustsec.org/advisories/RUSTSEC-2021-0076.htmlExploitIssue TrackingPatch
FAQ
What is CVE-2021-38195?
CVE-2021-38195 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.
How severe is CVE-2021-38195?
CVE-2021-38195 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-38195?
Check the references section above for vendor advisories and patch information. Affected products include: Parity Libsecp256K1.