VulnerabilityModified
CVE-2021-38195
It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.
CRITICAL 9.8EPSS 0.94%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.94% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- parity/libsecp256k1
- Source
- cve@mitre.org
References
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/libsecp256k1/RUSTSEC-2021-0076.mdThird Party Advisory
- https://rustsec.org/advisories/RUSTSEC-2021-0076.htmlExploit, Issue Tracking, Patch, Third Party Advisory
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/libsecp256k1/RUSTSEC-2021-0076.mdThird Party Advisory
- https://rustsec.org/advisories/RUSTSEC-2021-0076.htmlExploit, Issue Tracking, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.