10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
9.6 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.4%
xml-crypto is an xml digital signature and encryption library for Node.js. In affected versions the default configuration does not check authorization of the signer, it only checks the validity of the signature per section 3.2.2 of the w3 xmldsig-core-20080610 spec. As such, without additional validation steps, the default configuration allows a malicious actor to re-sign an XML document, place the certificate in a <KeyInfo />
element, and pass xml-crypto
default validation checks. As a result xml-crypto
trusts by default any certificate provided via digitally signed XML document’s <KeyInfo />
. xml-crypto
prefers to use any certificate provided via digitally signed XML document’s <KeyInfo />
even if library was configured to use specific certificate (publicCert
) for signature verification purposes. An attacker can spoof signature verification by modifying XML document and replacing existing signature with signature generated with malicious private key (created by attacker) and by attaching that private key’s certificate to <KeyInfo />
element. This vulnerability is combination of changes introduced to 4.0.0
on pull request 301 / commit c2b83f98
and has been addressed in version 6.0.0 with pull request 445 / commit 21201723d
. Users are advised to upgrade. Users unable to upgrade may either check the certificate extracted via getCertFromKeyInfo
against trusted certificates before accepting the results of the validation or set xml-crypto's getCertFromKeyInfo
to () => undefined
forcing xml-crypto
to use an explicitly configured publicCert
or privateKey
for signature verification.
[
{
"vendor": "node-saml",
"product": "xml-crypto",
"versions": [
{
"version": ">= 4.0.0, < 6.0.0",
"status": "affected"
}
]
}
]
github.com/node-saml/xml-crypto/commit/21201723d2ca9bc11288f62cf72552b7d659b000
github.com/node-saml/xml-crypto/commit/c2b83f984049edb68ad1d7c6ad0739ec92af11ca
github.com/node-saml/xml-crypto/pull/301
github.com/node-saml/xml-crypto/pull/445
github.com/node-saml/xml-crypto/security/advisories/GHSA-2xp3-57p7-qf4v
www.w3.org/TR/2008/REC-xmldsig-core-20080610/#sec-CoreValidation
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
9.6 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.4%