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runc (docker) File Descriptor Leak Privilege Escalation

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runc (docker) File Descriptor Leak Privilege Escalation

Disclosed
01/31/2024
Created
02/05/2024

Description

All versions of runc <=1.1.11, as used by containerization technologies such as Docker engine, and Kubernetes are vulnerable to an arbitrary file write. Due to a file descriptor leak it is possible to mount the host file system with the permissions of runc (typically root). Successfully tested on Ubuntu 22.04 with runc 1.1.7-0ubuntu1~22.04.1 and runc 1.1.11 using Docker build. Also tested on Debian 12.4.0 with runc 1.1.11 using Docker build.

Author(s)

  • h00die
  • SickMcNugget
  • jheysel-r7
  • Rory McNamara

Platform

Linux

Architectures

x86, x64

Development

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/linux/local/runc_cwd_priv_esc
msf exploit(runc_cwd_priv_esc) > show targets
    ...targets...
msf exploit(runc_cwd_priv_esc) > set TARGET < target-id >
msf exploit(runc_cwd_priv_esc) > show options
    ...show and set options...
msf exploit(runc_cwd_priv_esc) > exploit

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