CVE-2021-3493

Ubuntu OverlayFS स्थानीय विशेषाधिकार वृद्धि

विवरण

"Ubuntu specific issue in the overlayfs file system in the Linux kernel where it did not properly validate the application of file system capabilities with respect 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." - Ubuntu Security

Linux 5.11 में समाधान

प्रभावित संस्करण

• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 19.04 LTS
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS
• Ubuntu 14.04 ESM

जांच सूची: https://ubuntu.com/security/CVE-2021-3493

उपयोग

• gcc exploit.c -o exploit
• chmod +x exploit
• ./exploit shell|command

संदर्भ

• https://github.com/briskets/CVE-2021-3493