CVE-2016-4072
CriticalSummary
Rozszerzenie Phar w PHP przed wersjami 5.5.34, 5.6.20 oraz 7.0.5 zawiera podatność umożliwiającą zdalne wykonanie dowolnego kodu poprzez spreparowaną nazwę pliku. Problem wynika z nieprawidłowego obsługiwania znaków null (\0) w funkcji phar_analyze_path w pliku ext/phar/phar.c.
Risk Assessment
Atakujący może zdalnie wykonać dowolny kod na serwerze, co prowadzi do pełnego przejęcia kontroli nad aplikacją i potencjalnie całym systemem.
Recommendation
Należy niezwłocznie zaktualizować PHP do wersji 5.5.34, 5.6.20, 7.0.5 lub nowszej. Jeśli aktualizacja nie jest możliwa, należy wyłączyć rozszerzenie Phar.
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Original NVD description (English source)
The Phar extension in PHP before 5.5.34, 5.6.x before 5.6.20, and 7.x before 7.0.5 allows remote attackers to execute arbitrary code via a crafted filename, as demonstrated by mishandling of \0 characters by the phar_analyze_path function in ext/phar/phar.c.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS