CVEs-PoC/2020/CVE-2020-12062.md

CVE-2020-12062

Description

The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol" and "utimes does not fail under normal circumstances.

POC

Reference

No PoCs from references.

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/Totes5706/TotesHTB
• https://github.com/austin-lai/External-Penetration-Testing-Holo-Corporate-Network-TryHackMe-Holo-Network
• https://github.com/fc0d3x/softuni-recon-exam
• https://github.com/phanfivequ/xinminxuehui-milou-d46T7p3s8FIwKQp0
• https://github.com/wooflock/nmap-airgapped-vulnscan