CVE-2021-23008

On version 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and all versions of 16.0.x and 11.6.x., BIG-IP APM AD…

published May 10, 2021

CVSS
—
EPSS
1%
Percentile
70.7
In the wild
Unconfirmed
What it is

⚠️ BIG-IP APM's Active Directory authentication can be bypassed, but only through a cleverly spoofed response from an attacker. This is like a con artist getting a VIP pass by forging an access badge! 🔥 Think of it as a security guard at a club who mistakenly lets in someone with a fake VIP pass because they didn’t check it closely enough. If the attacker manages to compromise the Key Distribution Center (KDC), they can easily impersonate a legitimate user. An attacker with access to a compromised AD server could easily bypass authentication, granting unauthorized access to sensitive systems. This could lead to data breaches or unauthorized operations that could be absolutely devastating for your organization.

Put simply

Think of it as a security guard at a club who mistakenly lets in someone with a fake VIP pass because they didn’t check it closely enough. If the attacker manages to compromise the Key Distribution Center (KDC), they can easily impersonate a legitimate user. This vulnerability allows attackers to send a spoofed AS-REP response over a compromised KDC connection, letting them bypass the authentication checks typically enforced by BIG-IP APM. It primarily affects specific versions of the software that fail to validate the integrity of the response.

What to do

An attacker with access to a compromised AD server could easily bypass authentication, granting unauthorized access to sensitive systems. This could lead to data breaches or unauthorized operations that could be absolutely devastating for your organization. To mitigate this risk, upgrade to BIG-IP APM versions 15.1.3, 14.1.4, 13.1.4, and 12.1.6 or higher. Additionally, ensure your AD server is secure and monitor for any potential compromises. Regular security reviews of your KDC connection practices are also advisable. You can tackle this! Follow these steps to secure your BIG-IP environment, and you'll be well on your way to hero status! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01326 · 70.7th percentile
Published
2021-05-10T13:13Z
EPSS history
Timeline
  • 10 MAY 13:13Z
    On version 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and all versions of 16.0.x and 11.6.x., BIG-IP APM AD…
    cvelistv5