xml-crypto is an XML digital signature and encryption library for Node.js. An attacker may be able to exploit a vulnerability in versions prior to 6.0.1, 3.2.1, and 2.1.6 to bypass authentication or authorization mechanisms in systems that rely on xml-crypto for verifying signed XML documents. The vulnerability allows an attacker to modify a valid signed XML message in a way that still passes signature verification checks. For example, it could be used to alter critical identity or access control attributes, enabling an attacker with a valid account to escalate privileges or impersonate another user. Users of versions 6.0.0 and prior should upgrade to version 6.0.1 to receive a fix. Those who are still using v2.x or v3.x should upgrade to patched versions 2.1.6 or 3.2.1, respectively.

Affected: npm: xml-crypto

# Impact An attacker may be able to exploit this vulnerability to bypass authentication or authorization mechanisms in systems that rely on xml-crypto for verifying signed XML documents. The vulnerability allows an attacker to modify a valid signed XML message in a way that still passes signature verification checks. For example, it could be used to alter critical identity or access control attributes, enabling an attacker with a valid account to escalate privileges or impersonate another user.

# Patches All versions <= 6.0.0 are affected. Please upgrade to version 6.0.1.

If you are still using v2.x or v3.x please upgrade to the associated patch version.

# Indicators of Compromise

When logging XML payloads, check for the following indicators. If the payload includes encrypted elements, ensure you analyze the decrypted version for a complete assessment. (If encryption is not used, analyze the original XML document directly). This applies to various XML-based authentication and authorization flows, such as SAML Response payloads.

### Multiple SignedInfo Nodes There should not be more than one SignedInfo node inside a Signature. If you find multiple SignedInfo nodes, it could indicate an attack.

```xml <Signature> <SomeNode> <SignedInfo> <Reference URI="somefakereference"> <DigestValue>forgeddigestvalue</DigestValue> </Reference> </SignedInfo> </SomeNode> <SignedInfo> <Reference URI="realsignedreference">…

golang.org/x/net/html: Non-linear parsing of case-insensitive content in golang.org/x/net/html rollup: DOM Clobbering Gadget found in rollup bundled scripts that leads to XSS path-to-regexp: path-to-regexp Unpatched `path-to-regexp` ReDoS in 0.1.x nanoid: nanoid mishandles non-integer values jinja2: Jinja has a sandbox breakout through malicious filenames jinja2: Jinja has a sandbox breakout through indirect reference to format method systeminformation: Command injection vulnerability in getWindowsIEEE8021x (SSID) function in systeminformation undici: Undici Uses Insufficiently Random Values jinja2: Jinja sandbox breakout through attr filter selecting format method xml-crypto: xml-crypto Vulnerable to XML Signature Verification Bypass via Multiple SignedInfo References xml-crypto: xml-crypto Vulnerable to XML Signature Verification Bypass via DigestValue Comment

Ein entfernter anonymer oder lokaler Angreifer kann mehrere Schwachstellen in HCL BigFix ausnutzen, um Dateien zu manipulieren, erhöhte Privilegien zu erlangen, einen Denial-of-Service-Zustand auszulösen, vertrauliche Informationen offenzulegen und beliebigen Code auszuführen.