Vulnerability in Microsoft Windows
CVE-2020-15261
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.
EPSS: 0.113 (95.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Microsoft Windows
- Veyon — versions < 0.11.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-15261?
- CVE-2020-15261 is a high-severity vulnerability in Microsoft Windows, classified under Unquoted Search Path or Element. CVSS score: 8.0/10. Published 2020-10-19.
- How severe is CVE-2020-15261?
- High severity. CVSS v3 base score is 8.0 out of 10.
- Is CVE-2020-15261 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.