ghsa-6w63-h3fj-q4vw
Vulnerability from github
Published
2023-06-06 17:33
Modified
2024-01-25 21:05
Severity ?
Summary
fast-xml-parser vulnerable to Regex Injection via Doctype Entities
Details
Impact
"fast-xml-parser" allows special characters in entity names, which are not escaped or sanitized. Since the entity name is used for creating a regex for searching and replacing entities in the XML body, an attacker can abuse it for DoS attacks. By crafting an entity name that results in an intentionally bad performing regex and utilizing it in the entity replacement step of the parser, this can cause the parser to stall for an indefinite amount of time.
Patches
The problem has been resolved in v4.2.4
Workarounds
Avoid using DOCTYPE parsing by processEntities: false option.
{
"affected": [
{
"ecosystem_specific": {
"affected_functions": [
"(fast-xml-parser).XMLParser"
]
},
"package": {
"ecosystem": "npm",
"name": "fast-xml-parser"
},
"ranges": [
{
"events": [
{
"introduced": "4.1.3"
},
{
"fixed": "4.2.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-34104"
],
"database_specific": {
"cwe_ids": [
"CWE-1333"
],
"github_reviewed": true,
"github_reviewed_at": "2023-06-06T17:33:13Z",
"nvd_published_at": "2023-06-06T18:15:11Z",
"severity": "HIGH"
},
"details": "### Impact\n\"fast-xml-parser\" allows special characters in entity names, which are not escaped or sanitized. Since the entity name is used for creating a regex for searching and replacing entities in the XML body, an attacker can abuse it for DoS attacks. By crafting an entity name that results in an intentionally bad performing regex and utilizing it in the entity replacement step of the parser, this can cause the parser to stall for an indefinite amount of time.\n\n### Patches\nThe problem has been resolved in v4.2.4\n\n### Workarounds\nAvoid using DOCTYPE parsing by `processEntities: false` option.\n",
"id": "GHSA-6w63-h3fj-q4vw",
"modified": "2024-01-25T21:05:07Z",
"published": "2023-06-06T17:33:13Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-6w63-h3fj-q4vw"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-34104"
},
{
"type": "WEB",
"url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/39b0e050bb909e8499478657f84a3076e39ce76c"
},
{
"type": "WEB",
"url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/a4bdced80369892ee413bf08e28b78795a2b0d5b"
},
{
"type": "PACKAGE",
"url": "https://github.com/NaturalIntelligence/fast-xml-parser"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "fast-xml-parser vulnerable to Regex Injection via Doctype Entities"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.