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ABRT raceabrt Privilege Escalation

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ABRT raceabrt Privilege Escalation

Disclosed
04/14/2015
Created
06/14/2018

Description

This module attempts to gain root privileges on Linux systems with a vulnerable version of Automatic Bug Reporting Tool (ABRT) configured as the crash handler. A race condition allows local users to change ownership of arbitrary files (CVE-2015-3315). This module uses a symlink attack on `/var/tmp/abrt/*/maps` to change the ownership of `/etc/passwd`, then adds a new user with UID=0 GID=0 to gain root privileges. Winning the race could take a few minutes. This module has been tested successfully on: abrt 2.1.11-12.el7 on RHEL 7.0 x86_64; abrt 2.1.5-1.fc19 on Fedora Desktop 19 x86_64; abrt 2.2.1-1.fc19 on Fedora Desktop 19 x86_64; abrt 2.2.2-2.fc20 on Fedora Desktop 20 x86_64; abrt 2.3.0-3.fc21 on Fedora Desktop 21 x86_64.

Author(s)

  • Tavis Ormandy
  • bcoles <bcoles@gmail.com>

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/abrt_raceabrt_priv_esc
msf exploit(abrt_raceabrt_priv_esc) > show targets
    ...targets...
msf exploit(abrt_raceabrt_priv_esc) > set TARGET < target-id >
msf exploit(abrt_raceabrt_priv_esc) > show options
    ...show and set options...
msf exploit(abrt_raceabrt_priv_esc) > exploit

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