Vulnerability 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).
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pyinstaller | Pyinstaller | < 3.6 |
| Microsoft | Windows | - |
Related Weaknesses (CWE)
References
- https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-7fcj-pq9j-whPatchThird Party Advisory
- https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-7fcj-pq9j-whPatchThird Party Advisory
FAQ
What is CVE-2019-16784?
CVE-2019-16784 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 pr...
How severe is CVE-2019-16784?
CVE-2019-16784 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-16784?
Check the references section above for vendor advisories and patch information. Affected products include: Pyinstaller Pyinstaller, Microsoft Windows.