CVE-2022-42916
HighSummary
W curl przed wersją 7.86.0 istniała możliwość obejścia sprawdzenia HSTS, co mogło prowadzić do korzystania z HTTP zamiast HTTPS. Mechanizm ten mógł być obejściem w przypadku użycia znaków IDN w nazwie hosta, które były zamieniane na odpowiedniki ASCII podczas konwersji IDN.
Risk Assessment
Organizacje mogą być narażone na ataki typu man-in-the-middle, co może prowadzić do przechwytywania danych przesyłanych przez niezabezpieczone połączenia HTTP. To zwiększa ryzyko utraty poufnych informacji oraz naruszenia bezpieczeństwa.
Recommendation
Zaleca się aktualizację curl do wersji 7.86.0 lub nowszej, aby zabezpieczyć się przed tym rodzajem ataku. Dodatkowo, warto monitorować i weryfikować użycie HSTS w aplikacjach korzystających z curl.
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Original NVD description (English source)
In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS