CVE-2025-25186 (Medium) detected in net-imap-0.5.5.gem

[mend-bolt-for-github]

CVE-2025-25186 - Medium Severity Vulnerability

Vulnerable Library - net-imap-0.5.5.gem

Ruby client api for Internet Message Access Protocol

Library home page: https://rubygems.org/gems/net-imap-0.5.5.gem

Path to dependency file: /Gemfile.lock

Path to vulnerable library: /Gemfile.lock

Dependency Hierarchy:

• rails-6.1.7.10.gem (Root Library)
  • actionmailer-6.1.7.10.gem
    • mail-2.8.1.gem
      • ❌ net-imap-0.5.5.gem (Vulnerable Library)

Found in base branch: master

Vulnerability Details

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in "net-imap"'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed "uid-set" data which is automatically read by the client's receiver thread. The response parser uses "Range#to_a" to convert the "uid-set" data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory.

Publish Date: 2025-02-10

URL: CVE-2025-25186

CVSS 3 Score Details (6.5)

Base Score Metrics:

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

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-7fc5-f82f-cx69

Release Date: 2025-02-10

Fix Resolution: net-imap - 0.3.8,0.4.19,0.5.6

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