CVE-2020-12607
Summary
| CVE | CVE-2020-12607 |
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| State | PUBLIC |
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| Assigner | [email protected] |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2020-06-02 21:15:00 UTC |
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| Updated | 2020-06-03 13:47:00 UTC |
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| 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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NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|
| Update CHANGELOG.md · AntonKueltz/fastecdsa@4a16dae · GitHub |
CONFIRM |
github.com |
Issue Tracking, Patch, Third Party Advisory |
| Update docs to v2.1.2 · AntonKueltz/fastecdsa@7b64e3e · GitHub |
CONFIRM |
github.com |
Patch, Third Party Advisory |
| ECDSA verification fails for extreme value in k and s^-1 (P-256, SHA-256) · Issue #52 · AntonKueltz/fastecdsa · GitHub |
CONFIRM |
github.com |
Exploit, Third Party Advisory |
| Properly handle the point at infinity · AntonKueltz/fastecdsa@e592f10 · GitHub |
CONFIRM |
github.com |
Patch, Third Party Advisory |
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 980443 Python (pip) Security Update for fastecdsa (GHSA-56wv-2wr9-3h9r)
