CVE-2020-15261 Information

Description

On Windows the Veyon Service before version 4.4.2 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 problem has been fixed in version 4.4.2. As a workaround the exploitation of the vulnerability can be prevented by revoking administrative privileges from all potentially untrustworthy users.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/veyon/veyon/commit/f231ec511b9a09f43f49b2c7bb7c60b8046276b1 https://github.com/veyon/veyon/issues/657 https://github.com/veyon/veyon/security/advisories/GHSA-c8cc-x786-hqqp

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.7