Debian DSA-5132-1 Critical: ecdsautils Signature Forgery Issue

It was discovered that ecdsautils, a collection of ECDSA elliptic curve
cryptography CLI tools verified some cryptographic signatures incorrectly:
A signature consisting only of zeroes was always considered valid,
making it trivial to forge signatures.

For the oldstable distribution (buster), this problem has been fixed
in version 0.3.2+git20151018-2+deb10u1.

For the stable distribution (bullseye), this problem has been fixed in
version 0.3.2+git20151018-2+deb11u1.

We recommend that you upgrade your ecdsautils packages.

For the detailed security status of ecdsautils please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/ecdsautils

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/