Sudo Local Privilege Escalation via NSSwitch.conf in Chroot
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, with local access to the host, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf from a user-controlled directory is used with the --chroot option.
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 local user access to critical systems, especially those with sensitive data or functions. Implement strict privilege separation and least privilege principles for all users and services. Enhance monitoring for unusual Sudo activity, particularly attempts to use the --chroot option or modify /etc/nsswitch.conf in unusual contexts.
Upgrade Sudo to version 1.9.17p1 or later immediately to apply the patch addressing this vulnerability. Verify the upgrade by checking the Sudo version and testing its functionality in a controlled environment. Ensure all affected systems are updated to prevent exploitation.
Attackers can achieve full root privileges on the compromised system as a local user. This allows them to execute arbitrary commands, steal sensitive data, install malware, or disrupt critical services, leading to severe data breaches and system integrity loss. This completely compromises the affected system.
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