High severityNVD Advisory· Published Jun 2, 2020· Updated Aug 4, 2024
CVE-2020-12607
CVE-2020-12607
Description
An issue was discovered in fastecdsa before 2.1.2. When using the NIST P-256 curve in the ECDSA implementation, the point at infinity is mishandled. This means that for an extreme value in k and s^-1, the signature verification fails even if the signature is correct. This behavior is not solely a usability problem. There are some threat models where an attacker can benefit by successfully guessing users for whom signature verification will fail.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
fastecdsaPyPI | < 2.1.2 | 2.1.2 |
Affected products
2- fastecdsa/fastecdsadescription
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-56wv-2wr9-3h9rghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-12607ghsaADVISORY
- github.com/AntonKueltz/fastecdsa/commit/4a16daeaf139be20654ef58a9fe4c79dc030458cghsax_refsource_CONFIRMWEB
- github.com/AntonKueltz/fastecdsa/commit/7b64e3efaa806b4daaf73bb5172af3581812f8deghsax_refsource_CONFIRMWEB
- github.com/AntonKueltz/fastecdsa/commit/e592f106edd5acf6dacedfab2ad16fe6c735c9d1ghsax_refsource_CONFIRMWEB
- github.com/AntonKueltz/fastecdsa/issues/52ghsax_refsource_CONFIRMWEB
- github.com/pypa/advisory-database/tree/main/vulns/fastecdsa/PYSEC-2020-42.yamlghsaWEB
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