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Information Exposure Affecting libgcrypt20 package, versions <1.6.5-2ubuntu0.5

low

Snyk CVSS

    Attack Complexity High
    Confidentiality High

    Threat Intelligence

    EPSS 0.08% (33rd percentile)
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NVD
4.7 medium
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SUSE
5.1 medium
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Red Hat
5.1 medium

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  • Snyk ID SNYK-UBUNTU1604-LIBGCRYPT20-391883
  • published 13 Jun 2018
  • disclosed 13 Jun 2018
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Introduced: 13 Jun 2018

CVE-2018-0495 Open this link in a new tab
CWE-203 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 libgcrypt20 to version 1.6.5-2ubuntu0.5 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 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

References