CVE-2025-23395
HighSummary
Screen w wersji 5.0.0, działający z uprawnieniami setuid-root, nie obniża uprawnień podczas operacji na ścieżkach dostarczonych przez użytkownika. Umożliwia to nieuprzywilejowanym użytkownikom tworzenie plików w dowolnych lokalizacjach z własnością `root`, grupą właściciela użytkownika oraz trybem pliku 0644.
Risk Assessment
Ryzyko dla organizacji polega na możliwości eskalacji uprawnień do poziomu root przez nieuprzywilejowanych użytkowników, co może prowadzić do nieautoryzowanego dostępu do systemu i danych.
Recommendation
Zaleca się aktualizację do nowszej wersji Screen, która poprawia zarządzanie uprawnieniami, oraz ograniczenie dostępu do programu dla nieuprzywilejowanych użytkowników.
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Original NVD description (English source)
Screen 5.0.0 when it runs with setuid-root privileges does not drop privileges while operating on a user supplied path. This allows unprivileged users to create files in arbitrary locations with `root` ownership, the invoking user's (real) group ownership and file mode 0644. All data written to the Screen PTY will be logged into this file, allowing to escalate to root privileges
Vulnerability data from NVD (NIST) · CISA KEV · EPSS