💀 Linux local root exploit for CVE-2018-18955<h1 align='center'>CVE-2018-18955</h1>
Linux local root exploit.
Wrapper for Jann Horn's
[exploit](https://bugs.chromium.org/p/project-zero/issues/detail?id=1712) for
[CVE-2018-18955](https://nvd.nist.gov/vuln/detail/CVE-2018-18955), forked from
[kernel-exploits](https://github.com/bcoles/kernel-exploits).
In the Linux kernel 4.15.x through 4.19.x before 4.19.2, `map_write()`
in `kernel/user_namespace.c` allows privilege escalation because it
mishandles nested user namespaces with more than 5 UID or GID ranges. A
user who has `CAP_SYS_ADMIN` in an affected user namespace can bypass
access controls on resources outside the namespace, as demonstrated by
reading `/etc/shadow`. This occurs because an ID transformation takes
place properly for the namespaced-to-kernel direction but not for the
kernel-to-namespaced direction.
### Usage
Simply download one of the release archives and run one of the shell
scripts depending on the targeted exploitation technique.
### Disclaimer
Running unathorized attacks to public or private servers is illegal. The
content of this repository is for educational purposes only and no
responsibility will be taken by the authors in case of ill use of the
provided material.
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