Exploitation Summary
EIP tracks 2 public exploits for CVE-2019-16784. PoCs published by AlterSolutions, Ckrielle.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2019-16784, a PyInstaller privilege escalation vulnerability. The exploit involves DLL injection via a proxy DLL to execute arbitrary code in the context of a PyInstaller-packaged application.
Description
In PyInstaller before version 3.6, only on Windows, a local privilege escalation vulnerability is present in this particular case: If a software using PyInstaller in "onefile" mode is launched by a privileged user (at least more than the current one) which have his "TempPath" resolving to a world writable directory. This is the case for example if the software is launched as a service or as a scheduled task using a system account (TempPath will be C:\Windows\Temp). In order to be exploitable the software has to be (re)started after the attacker launch the exploit program, so for a service launched at startup, a service restart is needed (e.g. after a crash or an upgrade).
Exploits (2)
This repository contains a functional exploit for CVE-2019-16784, a PyInstaller privilege escalation vulnerability. The exploit involves DLL injection via a proxy DLL to execute arbitrary code in the context of a PyInstaller-packaged application.
This repository contains a functional proof-of-concept exploit for CVE-2019-16784, which leverages DLL hijacking in PyInstaller's `--onefile` mode to achieve command execution and potential local privilege escalation (LPE). The exploit targets a weak directory creation mechanism in PyInstaller versions < 3.6, allowing an attacker to place a malicious DLL in the predictable `C:\Windows\Temp\_MEI*PIDX*` directory.
References (1)
Scores
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H