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Ubuntu: (Multiple Advisories) (CVE-2022-24884): ECDSA Util vulnerability

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Ubuntu: (Multiple Advisories) (CVE-2022-24884): ECDSA Util vulnerability

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
05/06/2022
Created
07/21/2023
Added
07/21/2023
Modified
07/21/2023

Description

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.

Solution(s)

  • ubuntu-upgrade-ecdsautils

References

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