cpio RCE Exploit Caused by Integer Overflow

[Maverick Chung]

Hello,

Qiaoyi Fang (cc'ed) and I are both CS students at Duke, and we've discovered an RCE exploit in cpio, caused by an integer overflow in ds_fgetstr. We've created the exploit on cpio 2.13, on the version the current kali-rolling. We've attached a bug report containing all the details, as well as the files necessary to reproduce the exploit. Additionally, we've recorded the exploit here: https://youtu.be/F0yKJhu7Vak.

Please let us know if you have any questions. Thank you!

Sincerely,

Maverick Chung and Qiaoyi Fang

cpiopwn-files.zip
Description: cpiopwn-files.zip

cpio-bug-report.pdf
Description: cpio-bug-report.pdf