Headline
Ubuntu Security Notice USN-6673-3
Ubuntu Security Notice 6673-3 - USN-6673-1 provided a security update for python-cryptography. This update provides the corresponding update for Ubuntu 24.04 LTS. 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.
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Ubuntu Security Notice USN-6673-3
May 27, 2024
python-cryptography vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
Summary:
python-cryptography could be made to crash if it received specially crafted
input.
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 24.04 LTS.
Original advisory details:
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 24.04 LTS
python3-cryptography 41.0.7-4ubuntu0.1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6673-3
https://ubuntu.com/security/notices/USN-6673-1
CVE-2024-26130
Package Information:
https://launchpad.net/ubuntu/+source/python-cryptography/41.0.7-4ubuntu0.1
Related news
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Red Hat Security Advisory 2024-3781-03 - An update is now available for Red Hat Ansible Automation Platform 2.4. Issues addressed include HTTP request smuggling, buffer overflow, code execution, cross site scripting, denial of service, memory exhaustion, null pointer, and password leak vulnerabilities.
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.
If `pkcs12.serialize_key_and_certificates` is called with both: 1. A certificate whose public key did not match the provided private key 2. An `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)` Then a NULL pointer dereference would occur, crashing the Python process. This has been resolved, and now a `ValueError` is properly raised. Patched in https://github.com/pyca/cryptography/pull/10423