CVE-2020-26290CWE-347

Critical security issues in XML encoding in Dex

Critical · published December 28, 2020

CVSS v3.1
9.3
EPSS
1%
Percentile
62.1
In the wild
Unconfirmed
What it is

🔥 A critical vulnerability in Dex could let attackers bypass signatures like a magician pulling off a stunning trick! 🎩 Think of it like a security guard at a concert who lets someone in without checking their ticket — if the validation process isn't solid, unauthorized entries can slip right through the gate. An attacker could exploit this vulnerability to impersonate legitimate users, gaining unauthorized access to sensitive resources and data. This could lead to devastating consequences, including data leaks and significant security breaches that undermine trust in the entire authentication process.

Put simply

Think of it like a security guard at a concert who lets someone in without checking their ticket — if the validation process isn't solid, unauthorized entries can slip right through the gate. The vulnerability stems from issues with XML encoding in the Go library, allowing potential signature bypass in the SAML connector of Dex before version 2.27.0.

What to do

An attacker could exploit this vulnerability to impersonate legitimate users, gaining unauthorized access to sensitive resources and data. This could lead to devastating consequences, including data leaks and significant security breaches that undermine trust in the entire authentication process. Immediately update Dex to version 2.27.0 or later to patch this vulnerability. Review all configurations using the SAML connector to ensure they are secure and properly validated. You've got this! Take these steps to fortify your defenses and ensure your authentication process remains rock-solid. 🛡️

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00989 · 62.1th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2020-12-28T19:15Z
EPSS history
Timeline
  • 28 DEC 19:15Z
    Critical security issues in XML encoding in Dex
    cvelistv5