CVE-2019-18978: The rack-cors rubygem may allow directory traveral

CVE-2019-18978 · Severity: low · CVSS 3.1 · Published 2019-11-15

The rack-cors rubygem may allow directory traveral

Technologies: rack-cors (RubyGems). Vendors: RubyGems.

Quick answers

Is CVE-2019-18978 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2019-18978 being exploited in the wild.
How severe is CVE-2019-18978?
Low severity, with a CVSS score of 3.1, published 15 November 2019.
Which products and versions are affected?
rack-cors (RubyGems) ECOSYSTEM:introduced=0,fixed=1.0.4.
Is there a fix for CVE-2019-18978?
Yes. rack-cors (RubyGems): upgrade to 1.0.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2019-18978?
Check whether you run rack-cors (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • rack-cors (RubyGems): upgrade to 1.0.4 or later
    bundle update rack-cors

Affected products

  • rack-cors (RubyGems) ECOSYSTEM:introduced=0,fixed=1.0.4

Identifiers

  • CVE-2019-18978
  • GHSA-pf8f-w267-mq2h

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