Critical Security Flaw in SSSD Packages: Privilege Escalation Vulnerability
Summary
ALSA-2025:19610: Important: sssd security update. Affects libipa_hbac versions < 2.9.4-5.el8_10.3. Fixed in 2.9.4-5.el8_10.3. How to fix ↓
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Background
The System Security Services Daemon (SSSD) is a crucial service that manages access to remote directories and authentication mechanisms in Linux systems. It provides essential interfaces such as the Name Service Switch (NSS) and Pluggable Authentication Modules (PAM), enabling seamless integration with various account sources. This vulnerability affects multiple SSSD-related packages in AlmaLinux 8, potentially compromising system security.
Vulnerability Detail
The vulnerability, identified as CVE-2025-11561, arises from the default Kerberos configuration in SSSD, which allows for privilege escalation on Active Directory (AD)-joined Linux systems. This flaw can be exploited by attackers to gain unauthorized access to elevated privileges, leading to severe security breaches and potential system compromise.
How To Fix
Minimum fixed version
2.9.4-5.el8_10.3
This is the first release that contains the fix.
sudo dnf update libipa_hbacTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, system administrators can limit access to the affected services or implement stricter access controls until the patch is applied. However, this is not a permanent solution and should be followed by an update as soon as possible.
Conclusion
The SSSD vulnerability CVE-2025-11561 poses a significant risk to systems using affected packages. It is vital to apply the recommended updates to safeguard against potential privilege escalation attacks. Regular monitoring and timely updates are essential for maintaining system security.
See every vulnerability recorded for libipa_hbac →
FAQ
CVE-2025-11561 is a vulnerability in the SSSD package that allows for privilege escalation on AD-joined Linux systems due to a default Kerberos configuration.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Check your application against this vulnerability using the Vulert playground at Vulert Scanner.
Failing to address this vulnerability could lead to unauthorized access and control over the system, potentially resulting in data breaches and significant security incidents.
It is recommended to regularly check for updates and apply them promptly, especially when security vulnerabilities are disclosed.
While manual configuration may provide temporary relief, it is crucial to apply the official patch to ensure complete security against this vulnerability.
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