Vulnerability in Ecdsautils Project
CVE-2022-24884
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.010 (62.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000
Affected products
- Ecdsautils Project
- Freifunk-Gluon Ecdsautils — versions < 0.4.1
- Debian Linux — versions 9.0, 10.0, 11.0
- Fedoraproject Fedora — versions 34, 35, 36
Weakness classification (CWE)
References
- github.com/freifunk-gluon/ecdsautils/security/advisories/GHSA-qhcg-9ffp-78pw (Third Party Advisory)
- github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6… (Patch, Third Party Advisory)
- github.com/freifunk-gluon/ecdsautils/commit/39b6d0a77414fd41614953a0e185c4eefa2… (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/05/msg00007.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2022/dsa-5132 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-24884?
- CVE-2022-24884 is a critical-severity vulnerability in Ecdsautils Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 10.0/10. Published 2022-05-06.
- How severe is CVE-2022-24884?
- Critical severity. CVSS v3 base score is 10.0 out of 10.