USN-4196-1: python-ecdsa vulnerabilities

18 November 2019

Several security issues were fixed in python-ecdsa.

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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)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 19.10
Ubuntu 19.04
Ubuntu 18.04
Ubuntu 16.04

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

References

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