CVE-2008-5540
HighSummary
Podatność w Secure Computing Secure Web Gateway (Webwasher) umożliwia zdalnym atakującym ominięcie wykrywania złośliwego oprogramowania w dokumencie HTML. Wykorzystuje to poprzez umieszczenie nagłówka MZ na początku oraz modyfikację nazwy pliku, aby nie miała rozszerzenia lub miała rozszerzenie .txt lub .jpg.
Risk Assessment
Organizacja może być narażona na ataki z wykorzystaniem złośliwych dokumentów, które mogą przejść niezauważone przez systemy zabezpieczeń. To zwiększa ryzyko infekcji złośliwym oprogramowaniem oraz utraty danych.
Recommendation
Zaleca się aktualizację Secure Web Gateway oraz monitorowanie i filtrowanie ruchu sieciowego w celu wykrywania podejrzanych plików. Należy również rozważyć wprowadzenie dodatkowych zabezpieczeń w celu ochrony przed złośliwym oprogramowaniem.
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Original NVD description (English source)
Secure Computing Secure Web Gateway (aka Webwasher), 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.