PT-2019-16420 · Bitcoin Core · Libsecp256K1

Published 2019-10-14 · Updated 2021-08-25 · CVE-2019-25003

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions libsecp256k1 versions prior to 0.3.1

Description The issue allows attackers to obtain sensitive information through a timing side-channel attack because Scalar::check overflow does not execute in constant time. This enables an attacker to potentially leak information via a timing attack.

Recommendations For versions prior to 0.3.1, update to version 0.3.1 or later to ensure Scalar::check overflow executes in constant time, preventing timing side-channel attacks. As a temporary workaround, consider modifying Scalar::check overflow to execute in constant time until a patch is available.

Fix

Weakness Enumeration

CWE-208

Related Identifiers

CVE-2019-25003

GHSA-HRJM-C879-PP86

RUSTSEC-2019-0027

Affected Products

Libsecp256K1

References · 9

• https://osv.dev/vulnerability/GHSA-hrjm-c879-pp86 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-25003 · Security Note
• https://osv.dev/vulnerability/CVE-2019-25003 · Vendor Advisory
• https://osv.dev/vulnerability/RUSTSEC-2019-0027 · Vendor Advisory
• https://github.com/paritytech/libsecp256k1/commit/11ba23a9766a5079918cd9f515bc100bc8164b50 · Note
• https://github.com/paritytech/libsecp256k1 · Note
• https://t.me/cvenotify/8021 · Telegram Post
• https://rustsec.org/advisories/RUSTSEC-2019-0027.html · Note
• https://crates.io/crates/libsecp256k1 · Note