CVE-2008-5525
HighSummary
ClamAV w wersji 0.94.1 oraz prawdopodobnie 0.93.1, w połączeniu z Internet Explorer 6 lub 7, umożliwia zdalnym atakującym ominięcie wykrywania złośliwego oprogramowania w dokumencie HTML. Atak polega na umieszczeniu nagłówka MZ na początku oraz modyfikacji nazwy pliku, aby nie miała rozszerzenia, miała rozszerzenie .txt lub .jpg.
Risk Assessment
Organizacje mogą być narażone na złośliwe oprogramowanie, które nie zostanie wykryte przez ClamAV, co może prowadzić do poważnych incydentów bezpieczeństwa. W szczególności, atakujący mogą wykorzystać tę podatność do dostarczenia złośliwych dokumentów do użytkowników.
Recommendation
Zaleca się aktualizację ClamAV do najnowszej wersji, aby zminimalizować ryzyko związane z tą podatnością. Dodatkowo, warto rozważyć wdrożenie dodatkowych mechanizmów zabezpieczeń, które mogą pomóc w wykrywaniu złośliwych plików.
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Original NVD description (English source)
ClamAV 0.94.1 and possibly 0.93.1, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placing an MZ header (aka "EXE info") at the beginning, and modifying the filename to have (1) no extension, (2) a .txt extension, or (3) a .jpg extension, as demonstrated by a document containing a CVE-2006-5745 exploit.