cve/2021/CVE-2021-3492.md

CVE-2021-3492

Description

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.

POC

Reference

• http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/NaInSec/CVE-PoC-in-GitHub
• https://github.com/SYRTI/POC_to_review
• https://github.com/WhooAmii/POC_to_review
• https://github.com/hac425xxx/heap-exploitation-in-real-world
• https://github.com/joydo/CVE-Writeups
• https://github.com/k0mi-tg/CVE-POC
• https://github.com/kdn111/linux-kernel-exploitation
• https://github.com/khanhdn111/linux-kernel-exploitation
• https://github.com/khanhdz-06/linux-kernel-exploitation
• https://github.com/khanhdz191/linux-kernel-exploitation
• https://github.com/khanhhdz/linux-kernel-exploitation
• https://github.com/khanhhdz06/linux-kernel-exploitation
• https://github.com/khanhnd123/linux-kernel-exploitation
• https://github.com/knd06/linux-kernel-exploitation
• https://github.com/manas3c/CVE-POC
• https://github.com/ndk191/linux-kernel-exploitation
• https://github.com/nomi-sec/PoC-in-GitHub
• https://github.com/soosmile/POC
• https://github.com/ssr-111/linux-kernel-exploitation
• https://github.com/synacktiv/CVE-2021-3492
• https://github.com/trhacknon/Pocingit
• https://github.com/whoforget/CVE-POC
• https://github.com/wkhnh06/linux-kernel-exploitation
• https://github.com/xairy/linux-kernel-exploitation
• https://github.com/youwizard/CVE-POC
• https://github.com/zecool/cve