What is the CVSS score of CVE-2020-12607?

CVE-2020-12607 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 1.3%.

Is there a public PoC exploit available for CVE-2020-12607?

Yes, a public proof-of-concept exploit is available for CVE-2020-12607. Prioritise patching immediately. EPSS: 1.3%.

Is there a patch available for CVE-2020-12607?

Yes, a patch is available for CVE-2020-12607. Update the affected software to the latest version immediately.

Jwt Attack CVE-2020-12607

HIGH

Improper Verification of Cryptographic Signature (CWE-347)

2020-06-02 cve@mitre.org

Jwt Attack Information Disclosure Fastecdsa

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVE Published

Jun 02, 2020 - 21:15 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

3 pypi packages depend on fastecdsa (3 direct, 0 indirect)

Ecosystem-wide dependent count for version 2.1.2.

DescriptionNVD

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.

AnalysisAI

An issue was discovered in fastecdsa before 2.1.2. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-347. 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. Affected products include: Antonkueltz Fastecdsa. Version information: before 2.1.2..

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.