Important: python-ecdsa

Issue Overview:

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.

New Packages:

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  

Additional References

Red Hat: CVE-2019-14853, CVE-2019-14859

Mitre: CVE-2019-14853, CVE-2019-14859