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GameOver(lay) Privilege Escalation and Container Escape

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GameOver(lay) Privilege Escalation and Container Escape

Disclosed
07/26/2023
Created
12/19/2024

Description

This module exploits the use of unsafe functions in a number of Ubuntu kernels utilizing vunerable versions of overlayfs. To mitigate CVE-2021-3493 the Linux kernel added a call to vfs_setxattr during ovl_do_setxattr. Due to independent changes to the kernel by the Ubuntu development team __vfs_setxattr_noperm is called during ovl_do_setxattr without calling the intermediate safety function vfs_setxattr. Ultimatly this module allows for root access to be achieved by writing setuid capabilities to a file which are not sanitized after being unioned with the upper mounted directory.

Author(s)

  • g1vi
  • h00die
  • bwatters-r7
  • gardnerapp

Platform

Linux,Unix

Development

  • Source Code
  • History
  • 查看数 700
  • 已创建
  • 最后回复

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