5.9

CVE-2019-20399: parity libsecp256k1 Observable Discrepancy

CVSS: 5.9v3.1MediumModified
AliasesGHSA-7cqg-8449-rmfvRUSTSEC-2020-0156
Published 22-01-2020Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-20399 is a medium (CVSS 5.9) Observable Discrepancy vulnerability in parity libsecp256k1. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 58.6% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (NVD)
EPSS score
0.88%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-01-2020
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

A timing vulnerability in the Scalar::check_overflow function in Parity libsecp256k1-rs before 0.3.1 potentially allows an attacker to leak information via a side-channel attack.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.88%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

0.00 pp

From 0.88% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.88%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Crates.Io1 product
  • libsecp256k1-rs< 0.3.1 | ≥ 0.0.0-0, < 0.3.1
Parity1 product

2 vendors · 2 products

References

4 links