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Uncontrolled Recursion 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
    0.93% (84th percentile)

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  • Snyk ID SNYK-RHEL7-OPENSSL-4842391
  • published 26 Jul 2021
  • disclosed 27 Mar 2018
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Introduced: 27 Mar 2018

CVE-2018-0739 Open this link in a new tab
CWE-674 Open this link in a new tab
CWE-400 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.

Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).

References