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London
| CVEs: | |
| • http://blog.ptsecurity.com/2020/03/cve-2019-18683-exploiting-linux-kernel.html | |
| Exploiting a Linux kernel vuln. in the V4L2 subsystem (CVE-2019-18683). | |
| • https://google.github.io/security-research/pocs/linux/cve-2021-22555/writeup.html | |
| Turning \x00\x00 into 10000$ (CVE-2021-22555). | |
| • https://coreruleset.org/20210630/cve-2021-35368-crs-request-body-bypass/ | |
| CRS Request Body Bypass (CVE-2021-35368). |
In this short tutorial we will go over how to reproduce the crash from CVE-2020-8597. This is a stack-based buffer overflow in the pppd binary.
We will use our own pppd binary compiled from source, using the latest version: 2.4.8.
To accomplish this goal, we will need two Virtual Machines connected by a virtual serial port. I typically use VirtualBox since it is open source, but the same sort of configuration should work on other hypervisors.
I spun up two VMs:
