Three bypasses of Ubuntu’s unprivileged user namespace restrictions  – Full Disclosure

Posted by Qualys Security Advisory via Fulldisclosure on Mar 27

Qualys Security Advisory

Three bypasses of Ubuntu’s unprivileged user namespace restrictions

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Contents
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Summary
Bypass via aa-exec
Bypass via busybox
Bypass via LD_PRELOAD
Acknowledgments
Timeline (advisory sent to the Ubuntu Security Team on January 15, 2025)…
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