![ubuntu overlays privesc vulnerability](/assets/img/research-paper/preview/ubuntu-overlayfs-privesc-vulnerability.png)
Security Research
Ubuntu OverlayFS Local Privesc Vulnerability
The CVE-2021-3493 is an Ubuntu-specific issue in the overlayfs file system in the Linux kernel where there is a lack of proper validation of the application file system capabilities to user namespaces. A local attacker could use this to gain elevated privileges, due to a patch carried in Ubuntu to allow unprivileged overlayfs mounts.
Key Pointers:
- Understanding important key points used throughout the paper
- The severity and scope of impact of this vulnerability
- Learning about the mitigations for different Ubuntu versions
- Setting up the lab environment and demonstrating the exploitation method
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