What’s Vulnerable › Vulnerabilities

CVE-2023-50782: Python-cryptography: bleichenbacher timing oracle attack against rsa decryption - incomplete fix for cve-2020-25659

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-05 · updated 2026-06-17
• Weakness: CWE-203

Description

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.

Affected products

• Couchbase Server: 7.6.0, 7.6.1
• pyca cryptography: before 42.0.0 — fixed in 42.0.0
• Red Hat Ansible Automation Platform: 2.0
• Red Hat Enterprise Linux: 8.0, 9.0
• RedHat Update Infrastructure: 4

How to fix

Upgrade to a fixed version: pyca cryptography 42.0.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2023-50782
• https://bugzilla.redhat.com/show_bug.cgi?id=2254432
• https://access.redhat.com/security/cve/CVE-2023-50782
• https://bugzilla.redhat.com/show_bug.cgi?id=2254432
• https://www.couchbase.com/alerts/

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