Polkit Privilege Escalation via D-Bus Credential Bypass
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An attacker with a basic user account, with local access to the host, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
Limit unprivileged local user access to sensitive systems where possible, or segregate such systems. Implement robust monitoring for unusual or unauthorized D-Bus requests, particularly those involving polkit, from non-root users. Enforce the principle of least privilege rigorously across all user accounts to minimize the potential attack surface and damage if an escalation occurs.
Apply the official security patches released by the vendor for polkit to address the D-Bus credential bypass vulnerability. Ensure all affected systems running polkit are updated to a patched version to permanently eliminate the privilege escalation risk. Refer to the vendor's security advisories for specific update instructions and supported versions to ensure comprehensive remediation.
An unprivileged local attacker can exploit this flaw to bypass polkit's credential checks for D-Bus requests, effectively escalating their privileges to root. This allows the attacker to gain full control over the system, potentially creating new administrator accounts, accessing sensitive data, altering system configurations, or disrupting services. The highest threat is to data confidentiality and integrity as well as system availability.
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