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Information Exposure Affecting libgcrypt20 package, versions <1.6.3-2+deb8u3

0.0
medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High

    Threat Intelligence

    EPSS 0.4% (74th percentile)
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NVD
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-DEBIAN8-LIBGCRYPT20-391865
  • published 11 Jun 2017
  • disclosed 11 Jun 2017
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Introduced: 11 Jun 2017

CVE-2017-9526 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade Debian:8 libgcrypt20 to version 1.6.3-2+deb8u3 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 Debian. See How to fix? for Debian:8 relevant fixed versions and status.

In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.

References