CVE-2020-26214CWE-287

LDAP authentication bypass in Alerta

Critical · published November 6, 2020

Patch now

High probability of exploitation

CVSS calls it critical at 9.1. It sits in the 99.3th percentile for exploit probability.

CVSS v3.1
9.1
EPSS
66%
Percentile
99.3
In the wild
Unconfirmed
What it is

🚨 An empty password could be all it takes to slip past LDAP authentication in Alerta versions prior to 8.1.0! 🔥 Picture a nightclub that lets anyone through the door if they just wave their hand — that’s what it’s like when LDAP servers allow unauthenticated bind requests. Without proper checks, anyone could wander in and access sensitive areas. An attacker could stroll right into your system, bypassing authentication altogether and gaining unauthorized access to sensitive information. This could lead to data leaks or even worse, full control of the Alerta server! With such a critical flaw, it’s imperative to act fast before someone takes advantage of this vulnerability.

Put simply

Picture a nightclub that lets anyone through the door if they just wave their hand — that’s what it’s like when LDAP servers allow unauthenticated bind requests. Without proper checks, anyone could wander in and access sensitive areas. This vulnerability allows users to bypass LDAP authentication if they provide an empty password, particularly in configurations where the LDAP server permits unauthenticated bind requests. As a result, any deployment using these settings is at risk.

What to do

An attacker could stroll right into your system, bypassing authentication altogether and gaining unauthorized access to sensitive information. This could lead to data leaks or even worse, full control of the Alerta server! With such a critical flaw, it’s imperative to act fast before someone takes advantage of this vulnerability. Upgrade to Alerta version 8.1.0 or later to ensure that any authentication attempts with an empty password receive an HTTP 401 Unauthorized response. As an additional measure, LDAP administrators should disallow unauthenticated bind requests by clients to enhance security. This is fixable! By following these steps, you'll fortify your system and reclaim your security hero status. 🛡️

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
0.65933 · 99.3th percentile
Weakness
CWE-287 · Improper Authentication
Published
2020-11-06T17:50Z
EPSS history
Timeline
  • 06 NOV 17:50Z
    LDAP authentication bypass in Alerta
    cvelistv5