CVE-2008-2020
HighSummary
Implementacja CAPTCHA w różnych aplikacjach, takich jak PHP-Nuke, my123tkShop i inne, wykorzystuje obraz tła code_bg.jpg oraz funkcję PHP ImageString w sposób, który generuje niewystarczającą liczbę różnych obrazów. To umożliwia zdalnym atakującym przejście testu CAPTCHA za pomocą zautomatyzowanego ataku wykorzystującego tabelę wszystkich możliwych sum kontrolnych obrazów i odpowiadających im ciągów cyfr.
Risk Assessment
Organizacje korzystające z tych aplikacji są narażone na ataki, które mogą obejść mechanizm zabezpieczeń CAPTCHA, co prowadzi do potencjalnego nadużycia systemów i zasobów. To może skutkować nieautoryzowanym dostępem do kont użytkowników lub zasobów.
Recommendation
Zaleca się aktualizację aplikacji do najnowszych wersji, które poprawiają implementację CAPTCHA, oraz rozważenie wdrożenia alternatywnych metod weryfikacji użytkowników, aby zwiększyć bezpieczeństwo systemów.
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Original NVD description (English source)
The CAPTCHA implementation as used in (1) Francisco Burzi PHP-Nuke 7.0 and 8.1, (2) my123tkShop e-Commerce-Suite (aka 123tkShop) 0.9.1, (3) phpMyBitTorrent 1.2.2, (4) TorrentFlux 2.3, (5) e107 0.7.11, (6) WebZE 0.5.9, (7) Open Media Collectors Database (aka OpenDb) 1.5.0b4, and (8) Labgab 1.1 uses a code_bg.jpg background image and the PHP ImageString function in a way that produces an insufficient number of different images, which allows remote attackers to pass the CAPTCHA test via an automated attack using a table of all possible image checksums and their corresponding digit strings.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

