CVE-2019-25003
libsecp256k1 contains side-channel timing attack
An issue was discovered in the libsecp256k1 crate before 0.3.1 for Rust. Scalar::check_overflow allows a timing side-channel attack; consequently, attackers can obtain sensitive information.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in the libsecp256k1 crate before 0.3.1 for Rust. Scalar::check_overflow allows a timing side-channel attack; consequently, attackers can obtain sensitive information.
- Record
CVE-2019-25003- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
An issue was discovered in the libsecp256k1 crate before 0.3.1 for Rust. Scalar::check_overflow allows a timing side-channel attack; consequently, attackers can obtain sensitive information.
- Record
CVE-2019-25003- Updated
- 2026-11-02
EUVDEUVD-2021-1757 No score
An issue was discovered in the libsecp256k1 crate before 0.3.1 for Rust. Scalar::check_overflow allows a timing side-channel attack; consequently, attackers can obtain sensitive information.
- Record
EUVD-2021-1757- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hrjm-c879-pp86
libsecp256k1 contains side-channel timing attack
Versions of libsecp256k1 prior to 0.3.1 did not execute Scalar::check_overflow in constant time. This allows an attacker to potentially leak information via a timing attack. The flaw was corrected by modifying Scalar::check_overflow to execute in constant time.
- Record
GHSA-hrjm-c879-pp86- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-208
- Updated
- 2026-11-02
OSV
An issue was discovered in the libsecp256k1 crate before 0.3.1 for Rust. Scalar::check_overflow allows a timing side-channel attack; consequently, attackers can obtain sensitive information.
- Record
CVE-2019-25003- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
OSVGHSA-hrjm-c879-pp86
libsecp256k1 contains side-channel timing attack
Versions of libsecp256k1 prior to 0.3.1 did not execute Scalar::check_overflow in constant time. This allows an attacker to potentially leak information via a timing attack. The flaw was corrected by modifying Scalar::check_overflow to execute in constant time.
- Record
GHSA-hrjm-c879-pp86- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-208
- Updated
- 2026-11-02
OSVRUSTSEC-2019-0027
Flaw in Scalar::check_overflow allows side-channel timing attack
Versions of libsecp256k1 prior to 0.3.1 did not execute
Scalar::check_overflow in constant time.
This allows an attacker to potentially leak information via a timing attack.
The flaw was corrected by modifying Scalar::check_overflow to execute in constant time.
- Record
RUSTSEC-2019-0027- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libsecp256k1crates.io |
before 0.3.1 | 0.3.1 |
libsecp256k1crates.io |
0.0.0-0 up to 0.3.1 | 0.3.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-25003 is a high vulnerability (CVSS 7.5) in Parity Libsecp256k1, published October 14, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.70%, the 77th percentile. Fixed in libsecp256k1 0.3.1.