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Ubuntu 23.10 USN-6673-1 Critical: Python-Cryptography Denial Of Service

ubuntu
Calendar Grey March 4, 2024
Dist Ubuntu Esm H88
Multiple security vulnerabilities addressed in python-cryptography for Ubuntu, impacting denial of service and data exposure
Several security issues were fixed in python-cryptography.

Summary

Several security issues were fixed in python-cryptography.

Software Description:

- python-cryptography: Cryptography Python library

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)

It was discovered that python-cryptography incorrectly handled memory

operations when processing mismatched PKCS#12 keys. A remote attacker could

possibly use this issue to cause python-cryptography to crash, leading to a

denial of service. This issue only affected Ubuntu 23.10. (CVE-2024-26130)

Topics%20covered

Topics Covered

security advisory denial of service critical issue update instructions ubuntu data exposure python-cryptography

Update Instructions

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

Ubuntu 23.10:
   python3-cryptography            38.0.4-4ubuntu0.23.10.2

Ubuntu 22.04 LTS:
   python3-cryptography            3.4.8-1ubuntu2.2

Ubuntu 20.04 LTS:
   python-cryptography             2.8-3ubuntu0.3
   python3-cryptography            2.8-3ubuntu0.3

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   python-cryptography             2.1.4-1ubuntu1.4+esm1
   python3-cryptography            2.1.4-1ubuntu1.4+esm1

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

References

  https://ubuntu.com/security/notices/USN-6673-1

  CVE-2023-50782, CVE-2024-26130

Ubuntu Security Notice USN-6673-1

Topics%20covered

Topics Covered

security advisory denial of service critical issue update instructions ubuntu data exposure python-cryptography

Package Information

https://launchpad.net/ubuntu/+source/python-cryptography/38.0.4-4ubuntu0.23.10.2
https://launchpad.net/ubuntu/+source/python-cryptography/2.8-3ubuntu0.3

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