CVE-2022-24884

What it is

ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). `ecdsa_verify_[prepare_]legacy()` does not check whether the signature values `r` and `s` are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring multiple signatures from different public keys does not mitigate the issue: `ecdsa_verify_list_legacy()` will accept an arbitrary number of such forged signatures. Both the `ecdsautil verify` CLI command and the libecdsautil library are affected. The issue has been fixed in ecdsautils 0.4.1. All older versions of ecdsautils (including versions before the split into a library and a CLI utility) are vulnerable.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering.

Exploit odds

1.0% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2022-05-06 00:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:32 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.0% in the next 30 days (EPSS).
• Severity: 10.0 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2022-05-06 00:15 UTC

Last modified

2026-06-17 04:32 UTC

Exploit probability

1.0% · EPSS, next 30 days

Weakness

CWE-347

Record status

Modified

Affected

• Ecdsautils Project Ecdsautils < 0.4.1
• Fedoraproject Fedora 34
• Fedoraproject Fedora 35
• Fedoraproject Fedora 36
• Debian Linux 9.0
• Debian Linux 10.0
• Debian Linux 11.0

Attack profile CVSS 3.1 · 10.0

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-24884.md and follow it. Check whether this project is affected by CVE-2022-24884. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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