1. Ubuntu Security Notices
  2. USN-4196-1

USN-4196-1: python-ecdsa vulnerabilities

Publication date

18 November 2019

Overview

Several security issues were fixed in python-ecdsa.

Releases

Packages

Details

It was discovered that python-ecdsa incorrectly handled certain signatures.
A remote attacker could possibly use this issue to cause python-ecdsa to
generate unexpected exceptions, resulting in a denial of service.
(CVE-2019-14853)

It was discovered that python-ecdsa incorrectly verified DER encoding in
signatures. A remote attacker could use this issue to perform certain
malleability attacks. (CVE-2019-14859)

It was discovered that python-ecdsa incorrectly handled certain signatures.
A remote attacker could possibly use this issue to cause python-ecdsa to
generate unexpected exceptions, resulting in a denial of service.
(CVE-2019-14853)

It was discovered that python-ecdsa incorrectly verified DER encoding in
signatures. A remote attacker could use this issue to perform certain
malleability attacks. (CVE-2019-14859)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
19.10 eoan python-ecdsa –  0.13.2-2ubuntu0.1
python3-ecdsa –  0.13.2-2ubuntu0.1
19.04 disco python-ecdsa –  0.13-3ubuntu0.1
python3-ecdsa –  0.13-3ubuntu0.1
18.04 bionic python-ecdsa –  0.13-2ubuntu0.18.04.1
python3-ecdsa –  0.13-2ubuntu0.18.04.1
16.04 xenial python-ecdsa –  0.13-2ubuntu0.16.04.1
python3-ecdsa –  0.13-2ubuntu0.16.04.1

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References

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