Impact
On Windows the Veyon Service contains an unquoted service path vulnerability, allowing locally authenticated users with administrative privileges to run malicious executables with LocalSystem privileges. Since Veyon users (both students and teachers) usually don't have administrative privileges, this vulnerability is only dangerous in anyway unsafe setups. The Linux version of Veyon is not affected by this vulnerability.
Patches
The problem has been fixed in version 4.4.2. Windows users should upgrade to version 4.4.2 or newer.
Workarounds
The exploitation of the vulnerability can be prevented by revoking administrative privileges from all potentially untrustworthy users.
References
For more information
If you have any questions or comments about this advisory:
Impact
On Windows the Veyon Service contains an unquoted service path vulnerability, allowing locally authenticated users with administrative privileges to run malicious executables with LocalSystem privileges. Since Veyon users (both students and teachers) usually don't have administrative privileges, this vulnerability is only dangerous in anyway unsafe setups. The Linux version of Veyon is not affected by this vulnerability.
Patches
The problem has been fixed in version 4.4.2. Windows users should upgrade to version 4.4.2 or newer.
Workarounds
The exploitation of the vulnerability can be prevented by revoking administrative privileges from all potentially untrustworthy users.
References
For more information
If you have any questions or comments about this advisory: