USN-4196-1: python-ecdsa vulnerabilities

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Ubuntu security notices

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python-ecdsa vulnerabilities


A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
Summary


Several security issues were fixed in python-ecdsa.

Software Description

  • python-ecdsa - ECDSA cryptographic signature library
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)

Update instructions


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

Ubuntu 19.10
python-ecdsa - 0.13.2-2ubuntu0.1
python3-ecdsa - 0.13.2-2ubuntu0.1
Ubuntu 19.04
python-ecdsa - 0.13-3ubuntu0.1
python3-ecdsa - 0.13-3ubuntu0.1
Ubuntu 18.04 LTS
python-ecdsa - 0.13-2ubuntu0.18.04.1
python3-ecdsa - 0.13-2ubuntu0.18.04.1
Ubuntu 16.04 LTS
python-ecdsa - 0.13-2ubuntu0.16.04.1
python3-ecdsa - 0.13-2ubuntu0.16.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References


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