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Cryptographic Issues Affecting libgcrypt20 package, versions <1.6.5-2ubuntu0.3

0.0
medium

Snyk CVSS

    Attack Complexity High
    Scope Changed
    Confidentiality High

    Threat Intelligence

    EPSS 0.38% (73rd percentile)
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NVD
6.8 medium
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Red Hat
6.1 medium

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  • Snyk ID SNYK-UBUNTU1604-LIBGCRYPT20-391892
  • published 27 Jun 2018
  • disclosed 26 Jul 2018
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Introduced: 27 Jun 2018

CVE-2017-7526 Open this link in a new tab
CWE-310 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 libgcrypt20 to version 1.6.5-2ubuntu0.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.

References