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Use of Externally-Controlled Format String Affecting ruby package, versions <2.4.2-r0

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Availability High

    Threat Intelligence

    EPSS 1.26% (86th percentile)
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NVD
9.1 critical
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Red Hat
6.5 medium

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  • Snyk ID SNYK-ALPINE39-RUBY-338890
  • published 15 Sep 2017
  • disclosed 15 Sep 2017
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Introduced: 15 Sep 2017

CVE-2017-0898 Open this link in a new tab
CWE-134 Open this link in a new tab

How to fix?

Upgrade Alpine:3.9 ruby to version 2.4.2-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ruby package and not the ruby package as distributed by Alpine. See How to fix? for Alpine:3.9 relevant fixed versions and status.

Ruby before 2.4.2, 2.3.5, and 2.2.8 is vulnerable to a malicious format string which contains a precious specifier (*) with a huge minus value. Such situation can lead to a buffer overrun, resulting in a heap memory corruption or an information disclosure from the heap.

References