CVE-2023-34205

In Moov signedxml through 1.0.0, parsing the raw XML (as received) can result in different output than parsing the canonicalized XML

Critical · published May 30, 2023

CVSS v3.1
9.1
EPSS
0%
Percentile
31.8
In the wild
Unconfirmed
What it is

🚨 A signature wrapping attack is lurking in Moov signedxml up to version 1.0.0, ready to bypass validation like a sneaky raccoon slipping through a cracked window! 🔥 Think of it like an art forgery; the original painting is signed, but if the forger creates a near-perfect replica that bypasses the gallery's security checks, they can technically sell it as authentic. In this case, raw XML and canonicalized XML are the art, and the verification process is the security check that fails when not executed properly. An attacker could exploit this vulnerability to manipulate XML signatures, leading to unauthorized actions being performed as trusted operations. This could result in the theft of sensitive data, unauthorized access, or even complete system compromise! Time to take this seriously before catastrophe strikes!

Put simply

Think of it like an art forgery; the original painting is signed, but if the forger creates a near-perfect replica that bypasses the gallery's security checks, they can technically sell it as authentic. In this case, raw XML and canonicalized XML are the art, and the verification process is the security check that fails when not executed properly. CVE-2023-34205 allows attackers to bypass signature validation by manipulating how raw XML is parsed versus the canonicalized XML, leading to potential signature wrapping attacks.

What to do

An attacker could exploit this vulnerability to manipulate XML signatures, leading to unauthorized actions being performed as trusted operations. This could result in the theft of sensitive data, unauthorized access, or even complete system compromise! Time to take this seriously before catastrophe strikes! Update Moov signedxml to the latest version immediately to fix this critical vulnerability. Review your XML handling practices and ensure signature validation is robustly applied to both raw and canonicalized XML. Consider implementing strict controls and monitoring to catch any suspicious activity. You've got this! With these steps, you're on the fast track to securing your application! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00389 · 31.8th percentile
Published
2023-05-30T00:00Z
EPSS history
Timeline
  • 30 MAY 00:00Z
    In Moov signedxml through 1.0.0, parsing the raw XML (as received) can result in different output than parsing the canonicalized XML
    cvelistv5