Windows Kerberos Verhoging van Privileges Kwetsbaarheid

The path traversal vulnerability in Windows Kerberos allows an attacker who has already gained some level of access to the system to manipulate file paths. By crafting malicious requests, an attacker can potentially access files and directories outside of the intended scope, leading to privilege escalation. This could enable an attacker to read sensitive configuration files, modify system settings, or even execute arbitrary code with elevated privileges. The impact is particularly severe in domain environments where an attacker could leverage this vulnerability to compromise other systems and gain broader network access. Successful exploitation could lead to data breaches, system disruption, and complete compromise of the affected network.

Organizations heavily reliant on Kerberos authentication, particularly those with legacy systems or complex domain configurations, are at higher risk. Environments with weak access controls or insufficient network segmentation are also more vulnerable. Systems with outdated Kerberos configurations or those that have not been regularly patched are particularly susceptible to exploitation.

• windows / supply-chain:

Get-WinEvent -LogName Security -Filter "EventID = 4625 -MessageText '*\\'"

• windows / supply-chain:

Get-Process | Where-Object {$_.Path -match '\\'} | Select-Object Name, Path

• windows / supply-chain:

Get-ScheduledTask | Where-Object {$_.Actions.Path -match '\\'} | Select-Object TaskName, Actions.Path

1. 2025-08-12Disclosure

   disclosure

1. Gereserveerd2025-07-09
2. Gepubliceerd2025-08-12
3. Gewijzigd2026-02-26
4. EPSS bijgewerkt2026-03-23

The primary mitigation for CVE-2025-53779 is to upgrade affected Windows systems to version 10.0.26100.4946 or later, which includes the security fix. If immediate patching is not possible, consider implementing network segmentation to limit the potential blast radius of a successful attack. Review and restrict Kerberos authentication configurations to minimize the attack surface. Monitor network traffic for unusual file access patterns that might indicate exploitation attempts. While a direct WAF rule is unlikely, implementing strict access controls and monitoring Kerberos authentication events can help detect suspicious activity.