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Covert Timing Channel Affecting python3-M2Crypto package, versions <0.38.0-150400.3.6.1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    EPSS 0.17% (54th percentile)
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NVD
5.9 medium
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-SLES154-PYTHON3M2CRYPTO-2976171
  • published 6 Aug 2022
  • disclosed 5 Aug 2022
Report a new vulnerability Found a mistake?

Introduced: 5 Aug 2022

CVE-2020-25657 Open this link in a new tab
CWE-385 Open this link in a new tab

How to fix?

Upgrade SLES:15.4 python3-M2Crypto to version 0.38.0-150400.3.6.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-M2Crypto package and not the python3-M2Crypto package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.