The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory, which allows local users to obtain root access by leveraging a configuration in which overlayfs is permitted in an arbitrary mount namespace.
https://github.com/FernandoCassioDev/CVE-2015-1328
https://github.com/WhatsWrongAndWhy/CVE-2015-1328
https://github.com/saqib-butt2/blackbox-pentesting-infsecos
https://github.com/thieveshkar/RootQuest-CTF-Box-Multi-Stage-Exploitation-VM
https://github.com/1mgR00T/CVE-2015-1328
https://github.com/uttambodara/Awesome-Hacking-Learning-Path
https://github.com/sarperavci/ExploitMe
https://github.com/devtz007/overlayfs_CVE-2015-1328
https://github.com/QuantumPhysx2/CVE-Cheat-Sheet
https://github.com/notlikethis/CVE-2015-1328
https://www.exploit-db.com/exploits/37292/
https://people.canonical.com/~ubuntu-security/cve/2015/CVE-2015-1328.html