GHSA-6QVP-R6R3-9P7H

Vulnerability from github – Published: 2019-01-17 14:05 – Updated: 2025-12-04 16:20
VLAI
Summary
Nokogiri NULL Pointer Dereference
Details

A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND or XPATH_OP_OR case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "nokogiri"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-14404"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:20:04Z",
    "nvd_published_at": "2018-07-19T13:29:00Z",
    "severity": "HIGH"
  },
  "details": "A NULL pointer dereference vulnerability exists in the `xpath.c:xmlXPathCompOpEval()` function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the `XPATH_OP_AND` or `XPATH_OP_OR` case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.",
  "id": "GHSA-6qvp-r6r3-9p7h",
  "modified": "2025-12-04T16:20:45Z",
  "published": "2019-01-17T14:05:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-14404"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sparklemotion/nokogiri/issues/1785"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2019:1543"
    },
    {
      "type": "WEB",
      "url": "https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901817"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1595985"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2018-14404.yml"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/issues/10"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20190719-0002"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3739-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/3739-2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Nokogiri NULL Pointer Dereference"
}



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