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Covert Timing Channel Affecting openssl package, versions <1:1.0.2k-16.el7_6.1

Severity

 Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.6% (80th percentile)

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  • Snyk ID SNYK-RHEL7-OPENSSL-4844806
  • published 26 Jul 2021
  • disclosed 25 Oct 2018
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Introduced: 25 Oct 2018

CVE-2018-0735 Open this link in a new tab
CWE-385 Open this link in a new tab

How to fix?

Upgrade RHEL:7 openssl to version 1:1.0.2k-16.el7_6.1 or higher.
This issue was patched in RHSA-2019:0483.

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.

The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).

References

CVSS Scores

version 3.1
Expand this section

NVD

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