GHSA-VM74-J4WQ-82XJ

Vulnerability from github – Published: 2023-01-17 21:30 – Updated: 2026-02-17 22:04
VLAI
Summary
Sisimai Inefficient Regular Expression Complexity vulnerability
Details

A vulnerability has been found in Sisimai up to 4.25.14p11 and classified as problematic. This vulnerability affects the function to_plain of the file lib/sisimai/string.rb. The manipulation leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. Upgrading to version 4.25.14p12 is able to address this issue. The name of the patch is 51fe2e6521c9c02b421b383943dc9e4bbbe65d4e. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-218452.

Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "sisimai"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.25.14p12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-4891"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-01-20T23:19:16Z",
    "nvd_published_at": "2023-01-17T20:15:00Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability has been found in Sisimai up to 4.25.14p11 and classified as problematic. This vulnerability affects the function `to_plain` of the file `lib/sisimai/string.rb`. The manipulation leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. Upgrading to version 4.25.14p12 is able to address this issue. The name of the patch is 51fe2e6521c9c02b421b383943dc9e4bbbe65d4e. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-218452.",
  "id": "GHSA-vm74-j4wq-82xj",
  "modified": "2026-02-17T22:04:50Z",
  "published": "2023-01-17T21:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4891"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sisimai/rb-sisimai/pull/244"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sisimai/rb-sisimai/commit/51fe2e6521c9c02b421b383943dc9e4bbbe65d4e"
    },
    {
      "type": "WEB",
      "url": "https://gist.githubusercontent.com/gmcabrita/e5dc0332473fc2e3a7a407434c8d21c7/raw/00b12035e5e1b685469f143b94301a50306376ba/example.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sisimai/CVE-2022-4891.yml"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sisimai/rb-sisimai"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sisimai/rb-sisimai/releases/tag/v4.25.14p12"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.218452"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.218452"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Sisimai Inefficient Regular Expression Complexity vulnerability"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.