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Ubuntu Security Notice USN-6673-1

Ubuntu Security Notice USN-6673-1
Posted Mar 4, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6673-1 - 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. 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.

tags | advisory, remote, denial of service, python
systems | linux, ubuntu
advisories | CVE-2023-50782, CVE-2024-26130
SHA-256 | 01de93cd85b2bb26752f49682241d7f6847ee989213ef66fd7a7389e73b6b48a

Ubuntu Security Notice USN-6673-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-6673-1
March 04, 2024

python-cryptography vulnerabilities
==========================================================================

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

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