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Information Exposure Affecting openssl package, versions <1:1.0.2k-16.el7

Severity

 Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.08% (35th percentile)

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  • Snyk ID SNYK-RHEL7-OPENSSL-4841854
  • published 26 Jul 2021
  • disclosed 13 Jun 2018
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Introduced: 13 Jun 2018

CVE-2018-0495 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade RHEL:7 openssl to version 1:1.0.2k-16.el7 or higher.
This issue was patched in RHSA-2018:3221.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by RHEL. See How to fix? for RHEL:7 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