CVE-2022-31163 (High) detected in tzinfo-1.2.7.gem

[mend-bolt-for-github]

CVE-2022-31163 - High Severity Vulnerability

Vulnerable Library - tzinfo-1.2.7.gem

TZInfo provides daylight savings aware transformations between times in different time zones.

Library home page: https://rubygems.org/gems/tzinfo-1.2.7.gem

Dependency Hierarchy:

• github-pages-207.gem (Root Library)
  • jekyll-mentions-1.5.1.gem
    • html-pipeline-2.14.0.gem
      • activesupport-6.0.3.2.gem
        • ❌ tzinfo-1.2.7.gem (Vulnerable Library)

Found in base branch: main

Vulnerability Details

TZInfo is a Ruby library that provides access to time zone data and allows times to be converted using time zone rules. Versions prior to 0.36.1, as well as those prior to 1.2.10 when used with the Ruby data source tzinfo-data, are vulnerable to relative path traversal. With the Ruby data source, time zones are defined in Ruby files. There is one file per time zone. Time zone files are loaded with require on demand. In the affected versions, TZInfo::Timezone.get fails to validate time zone identifiers correctly, allowing a new line character within the identifier. With Ruby version 1.9.3 and later, TZInfo::Timezone.get can be made to load unintended files with require, executing them within the Ruby process. Versions 0.3.61 and 1.2.10 include fixes to correctly validate time zone identifiers. Versions 2.0.0 and later are not vulnerable. Version 0.3.61 can still load arbitrary files from the Ruby load path if their name follows the rules for a valid time zone identifier and the file has a prefix of tzinfo/definition within a directory in the load path. Applications should ensure that untrusted files are not placed in a directory on the load path. As a workaround, the time zone identifier can be validated before passing to TZInfo::Timezone.get by ensuring it matches the regular expression \A[A-Za-z0-9+\-_]+(?:\/[A-Za-z0-9+\-_]+)*\z.

Publish Date: 2022-07-22

URL: CVE-2022-31163

CVSS 3 Score Details (8.1)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-5cm2-9h8c-rvfx

Release Date: 2022-07-22

Fix Resolution: tzinfo - 0.3.61,1.2.10

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Micro-Learning Topic: Path traversal (Detected by phrase)

Matched on "path traversal"

What is this? (2min video)

Path traversal vulnerabilities occur when inputs that have not been sufficiently validated or sanitised are used to build directory or file paths. If an attacker can influence the path being accessed by the server, they may be able to gain unauthorised access to files or even execute arbitrary code on the server (when coupled with file upload functionality).

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Micro-Learning Topic: Vulnerable library (Detected by phrase)

Matched on "Vulnerable Library"

What is this? (2min video)

Use of vulnerable components will introduce weaknesses into the application. Components with published vulnerabilities will allow easy exploitation as resources will often be available to automate the process.

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