Missing Required Cryptographic Step 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
5.23% (93rd percentile)

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  • Snyk IDSNYK-RHEL7-OPENSSL-4899732
  • published26 Jul 2021
  • disclosed12 Jun 2018

Introduced: 12 Jun 2018

CVE-2018-0732  (opens in a new tab)
CWE-325  (opens 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.

During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).

References

CVSS Scores

version 3.1