CVE-2021-38195
CRITICALCVSS 9.8/10EPSS 0.94%
Last modified
CVE-2021-38195 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.94% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Parity | Libsecp256k1 | < 0.5.0 |
References
- https://rustsec.org/advisories/RUSTSEC-2021-0076.htmlExploit, Issue Tracking, Patch, Third Party Advisory
- https://rustsec.org/advisories/RUSTSEC-2021-0076.htmlExploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-38195?
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 a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.
How do I fix CVE-2021-38195?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-38195?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST