GHSA-cgx6-hpwq-fhv5: Nokogiri Integer Overflow Or Wraparound Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cgx6-hpwq-fhv5",
  "modified" : "2022-05-18T20:06:48Z",
  "published" : "2022-05-18T20:06:48Z",
  "aliases" : [ ],
  "summary" : "Integer Overflow or Wraparound in libxml2 affects Nokogiri",
  "details" : "### Summary\n\nNokogiri v1.13.5 upgrades the packaged version of its dependency libxml2 from v2.9.13 to [v2.9.14](https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.9.14).\n\nlibxml2 v2.9.14 addresses [CVE-2022-29824](https://nvd.nist.gov/vuln/detail/CVE-2022-29824). This version also includes several security-related bug fixes for which CVEs were not created, including a potential double-free, potential memory leaks, and integer-overflow.\n\nPlease note that this advisory only applies to the CRuby implementation of Nokogiri `< 1.13.5`, and only if the _packaged_ libraries are being used. If you've overridden defaults at installation time to use _system_ libraries instead of packaged libraries, you should instead pay attention to your distro's `libxml2` and `libxslt` release announcements.\n\n\n### Mitigation\n\nUpgrade to Nokogiri `>= 1.13.5`.\n\nUsers who are unable to upgrade Nokogiri may also choose a more complicated mitigation: compile and link Nokogiri against external libraries libxml2 `>= 2.9.14` which will also address these same issues.\n\n\n### Impact\n\n#### libxml2 [CVE-2022-29824](https://nvd.nist.gov/vuln/detail/CVE-2022-29824)\n\n- **CVSS3 score**:\n  - Unspecified upstream\n  - Nokogiri maintainers evaluate at 8.6 (High) ([CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H](https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H)). Note that this is different from the CVSS assessed by NVD.\n- **Type**: Denial of service, information disclosure\n- **Description**: In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well.\n- **Fixed**: https://gitlab.gnome.org/GNOME/libxml2/-/commit/2554a24\n\nAll versions of libml2 prior to v2.9.14 are affected.\n\nApplications parsing or serializing multi-gigabyte documents (in excess of INT_MAX bytes) may be vulnerable to an integer overflow bug in buffer handling that could lead to exposure of confidential data, modification of unrelated data, or a segmentation fault resulting in a denial-of-service.\n\n\n### References\n\n- [libxml2 v2.9.14 release notes](https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.9.14)\n- [CVE-2022-29824](https://nvd.nist.gov/vuln/detail/CVE-2022-29824)\n- [CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer](https://cwe.mitre.org/data/definitions/119.html)\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "nokogiri"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.13.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-cgx6-hpwq-fhv5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-29824"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sparklemotion/nokogiri"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.9.14"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-190" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-05-18T20:06:48Z",
    "nvd_published_at" : null
  }
}