CVE-2019-20399
MEDIUM
5.9
CVSS Score
Published: January 22, 2020 at 11:12 PM UTC
Updated: June 17, 2026 at 02:30 AM UTC
1 product affected across 1 vendorLIBSECP256K1
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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.9%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
LIBSECP256K1· Paritycargo
95%v < 0.3.1
Affected range stops below 0.3.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/paritytech/libsecp256k1/commit/11ba23a9766a5079918cd9f515bc100bc8164b50CVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-203
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