Amazon Linux 1 Security Advisory: ALAS-2023-1800
Advisory Release Date: 2023-08-03 20:16 Pacific
Advisory Updated Date: 2023-08-08 20:52 Pacific
An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service. (CVE-2019-14853)
A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions. (CVE-2019-14859)
Affected Packages:
python-ecdsa
Issue Correction:
Run yum update python-ecdsa to update your system.
noarch:
python27-ecdsa-0.11-3.4.amzn1.noarch
python26-ecdsa-0.11-3.4.amzn1.noarch
src:
python-ecdsa-0.11-3.4.amzn1.src