ubuntu-cve-2025-25186
Vulnerability from osv_ubuntu
Published
2025-02-10 16:15
Modified
2026-04-22 07:54
Summary
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.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libruby3.2",
            "binary_version": "3.2.3-1ubuntu0.24.04.5"
          },
          {
            "binary_name": "ruby3.2",
            "binary_version": "3.2.3-1ubuntu0.24.04.5"
          }
        ],
        "priority_reason": "Memory consumption issue by malicious imap server"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "ruby3.2",
        "purl": "pkg:deb/ubuntu/ruby3.2@3.2.3-1ubuntu0.24.04.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.3-1ubuntu0.24.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.3-1",
        "3.2.3-1build2",
        "3.2.3-1build3",
        "3.2.3-1ubuntu0.24.04.1",
        "3.2.3-1ubuntu0.24.04.3"
      ]
    }
  ],
  "aliases": [],
  "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`\u0027s 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\u0027s 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.",
  "id": "UBUNTU-CVE-2025-25186",
  "modified": "2026-04-22T07:54:09Z",
  "published": "2025-02-10T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-25186"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-25186"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/ruby/net-imap/security/advisories/GHSA-7fc5-f82f-cx69"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7418-1"
    }
  ],
  "related": [
    "USN-7418-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-25186"
  ]
}



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