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


Severity

Recommended
high

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    0.15% (52nd percentile)

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  • Snyk ID SNYK-ORACLE7-OPENSSLPERL-2505943
  • published 10 Apr 2022
  • disclosed 3 Mar 2016

How to fix?

Upgrade Oracle:7 openssl-perl to version 1:1.0.1e-51.el7_2.4 or higher.
This issue was patched in ELSA-2016-0301.

NVD Description

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

CVSS Scores

version 3.1
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NVD

5.1 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    None
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Red Hat

4 medium