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Timing Attack Affecting cryptography package, versions [,39.0.1)

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.16% (52nd percentile)
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NVD
5.9 medium
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SUSE
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-PYTHON-CRYPTOGRAPHY-3315331
  • published 8 Feb 2023
  • disclosed 7 Feb 2023
  • credit Hubert Kario
Report a new vulnerability Found a mistake?

Introduced: 7 Feb 2023

CVE-2022-4304 Open this link in a new tab
CWE-208 Open this link in a new tab

How to fix?

Upgrade cryptography to version 39.0.1 or higher.

Overview

Affected versions of this package are vulnerable to Timing Attack in rsa/rsa_ossl.c. An attacker can recover ciphertext with a Bleichenbacher style attack by sending a large number of trial messages (Marvin). This affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP, and RSASVE.