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Ubuntu Security Notice USN-6673-1
March 04, 2024
python-cryptography vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
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)
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
Package Information:
https://launchpad.net/ubuntu/+source/python-cryptography/38.0.4-4ubuntu0.23.10.2
https://launchpad.net/ubuntu/+source/python-cryptography/3.4.8-1ubuntu2.2
https://launchpad.net/ubuntu/+source/python-cryptography/2.8-3ubuntu0.3