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CVE-2021-3156: Heap-Based Buffer Overflow in Sudo (Baron Samedit)
Root Exploit (No BruteForce)
All research credit: Qualys Research Team
Check out the details on their blog.
Manually installed Ubuntu 20.04 LTS and Sudo version 1.8.31 on Docker container for testing purpose and running the command sudoedit -s 'AAAAAAAAAAAAAAAAAAAA\'.
PoC
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CVE-2021-3156: Heap-Based Buffer Overflow in Sudo (Baron Samedit)