dbcve.org
FedoraOperating system · Fedoraproject

CVE-2022-24884

HIGH · 7.5 CVSS v3.1 Published 2022-05-06
Fix available
A fix is available. Upgrade to 0.4.1 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-347

The application accepts signed data without properly verifying the signature, so an attacker can forge or tamper with content that the system is meant to trust — tokens, updates, licences. Everything built on that trust then becomes unreliable. Remediation is verifying every signature against the correct key and rejecting anything that does not validate.

General guidance for the improper signature verification class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
FedoraOperating system
Affected:= 34= 35= 36
Debian LinuxOperating system
Affected:= 9.0= 10.0= 11.0
EcdsautilsApplication
Affected:< 0.4.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 0.4.1 or later
Fixed in 0.4.1
Vendor patch github.com →
Recommended fix High confidence

ecdsautils version 0.4.1

  1. Check current ecdsautils version using: ecdsautil --version or rpm -q ecdsautils (Fedora) / dpkg -l ecdsautils (Debian)
  2. For Fedora systems: Run `sudo dnf update ecdsautils` to upgrade to the fixed version in the repository
  3. For Debian systems: Run `sudo apt-get update && sudo apt-get install ecdsautils` to get the updated package
  4. Verify the installed version is 0.4.1 or later using: ecdsautil --version
  5. If the package is not available in your distribution's repositories, compile from source: Clone https://github.com/freifunk-gluon/ecdsautils, checkout commit 1d4b091abdf15ad7b2312535b5b95ad70f6dbd08 or tag v0.4.1, then build and install using autotools (./autogen.sh && ./configure && make && sudo make install)

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-24884 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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