What is CVE-2021-43568?

CVE-2021-43568 is a critical-severity vulnerability in Starkbank Elixir Ecdsa, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2021-11-09.

How severe is CVE-2021-43568?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Starkbank Elixir Ecdsa

CVE-2021-43568

The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

EPSS: 0.010 (59.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Starkbank Elixir_ecdsa — versions 1.0.0
N/a — versions n/a

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-43568?: CVE-2021-43568 is a critical-severity vulnerability in Starkbank Elixir Ecdsa, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2021-11-09.
How severe is CVE-2021-43568?: Critical severity. CVSS v3 base score is 9.8 out of 10.