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Information Exposure Affecting openssl-libs package, versions <1:1.0.1e-51.el7_2.4

high

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.15% (51st percentile)
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NVD
5.1 medium
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Red Hat
4 medium

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  • Snyk ID SNYK-CENTOS7-OPENSSLLIBS-2060458
  • published 26 Jul 2021
  • disclosed 1 Mar 2016
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Introduced: 1 Mar 2016

CVE-2016-0702 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade Centos:7 openssl-libs to version 1:1.0.1e-51.el7_2.4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl-libs package and not the openssl-libs package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

The MOD_EXP_CTIME_COPY_FROM_PREBUF function in crypto/bn/bn_exp.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not properly consider cache-bank access times during modular exponentiation, which makes it easier for local users to discover RSA keys by running a crafted application on the same Intel Sandy Bridge CPU core as a victim and leveraging cache-bank conflicts, aka a "CacheBleed" attack.

References