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CVE-2019-25003

23
FAUCET Score

CVE-2019-25003 is a timing side-channel vulnerability in the libsecp256k1 Rust crate, specifically within the Scalar::check_overflow function, affecting versions prior to 0.3.1. This flaw allows attackers to potentially obtain sensitive information due to observable timing differences. With a CVSS score of 7.5 (High), it presents a significant risk (AV:N/AC:L/C:H), indicating it can be exploited remotely with low attack complexity, leading to high confidentiality impact. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.3.1CPE matchmatch criteria
cpe:2.3:a:parity:libsecp256k1:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.42%
Probability of exploitation in next 30 days
EPSS Percentile
69.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0141 is in the 51st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: libsecp256k1Fixed in: 0.3.1

Vendor Advisories (1)

rustGHSA-hrjm-c879-pp86high

libsecp256k1 contains side-channel timing attack

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2019-0027.html
Third Party Advisory