CVE-2020-15261

NameCVE-2020-15261
DescriptionOn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
veyon (PTS)buster4.1.7+repack1-1fixed
bullseye4.5.3+repack1-1fixed
bookworm4.7.5+repack1-1fixed
sid, trixie4.7.5+repack1-1.2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
veyonsource(unstable)(not affected)

Notes

- veyon <not-affected> (Windows-specific)
https://github.com/veyon/veyon/security/advisories/GHSA-c8cc-x786-hqqp

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