module

ABRT raceabrt Privilege Escalation

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Disclosed
2015-04-14
Created
2018-06-14

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.

Authors

Tavis Ormandy
bcoles bcoles@gmail.com

Platform

Linux

Architectures

x86, x64

References

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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