Headline
Ubuntu Security Notice USN-6673-2
Ubuntu Security Notice 6673-2 - USN-6673-1 provided a security update for python-cryptography. This update provides the corresponding update for Ubuntu 16.04 LTS. 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.
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Ubuntu Security Notice USN-6673-2
March 14, 2024
python-cryptography vulnerability
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
Related news
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.
A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.