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Ubuntu Security Notice USN-6673-2
March 14, 2024
python-cryptography vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
Summary:
python-cryptography could be made to expose sensitive information over the
network.
Software Description:
- python-cryptography: Cryptography Python library
Details:
USN-6673-1 provided a security update for python-cryptography.
This update provides the corresponding update for Ubuntu 16.04 LTS.
Original advisory details:
  Hubert Kario discovered that python-cryptography incorrectly handled
  errors returned by the OpenSSL API when processing incorrect padding in
  RSA PKCS#1 v1.5. A remote attacker could possibly use this issue to expose
  confidential or sensitive information. (CVE-2023-50782)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   python-cryptography             1.2.3-1ubuntu0.3+esm1
   python3-cryptography            1.2.3-1ubuntu0.3+esm1
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6673-2
   https://ubuntu.com/security/notices/USN-6673-1
   CVE-2023-50782