Covert Timing Channel Affecting python-cryptography package, versions <3.2.1-1


0.0
medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High

    Threat Intelligence

    EPSS 0.11% (45th 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-DEBIAN13-PYTHONCRYPTOGRAPHY-5692944
  • published 27 Oct 2020
  • disclosed 11 Jan 2021

How to fix?

Upgrade Debian:13 python-cryptography to version 3.2.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-cryptography package and not the python-cryptography package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.