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Use of Externally-Controlled Format String Affecting ruby package, versions <2.5.1-r0

Severity

 Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.44% (75th percentile)

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  • Snyk IDSNYK-ALPINE312-RUBY-587766
  • published3 Apr 2018
  • disclosed3 Apr 2018
Report a new vulnerability Found a mistake?

Introduced: 3 Apr 2018

CVE-2018-8778  (opens in a new tab)
CWE-134  (opens in a new tab)

How to fix?

Upgrade Alpine:3.12 ruby to version 2.5.1-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:3.12 relevant fixed versions and status.

In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure.

References