9.8

CVE-2021-38195: parity libsecp256k1

Modified
AliasesGHSA-g4vj-x7v9-h82mRUSTSEC-2021-0076
Published 08-08-2021Last modified 04-08-2024

Vulnerability summary

CVE-2021-38195 is a critical (CVSS 9.8) vulnerability in parity libsecp256k1. EPSS estimates a 0.94% chance of exploitation in the next 30 days, higher than 60.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.94%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Timeline

  1. 08-08-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.94%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.94% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (rustsec.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • libsecp256k1< 0.5.0 | ≥ 0.0.0-0, < 0.5.0
Parity1 product

2 vendors · 2 products

References

6 links