CVE-2026-2474
HighSummary
Wersje Crypt::URandom od 0.41 do przed 0.55 dla Perla są podatne na przepełnienie bufora w stercie w funkcji XS crypt_urandom_getrandom(). Funkcja ta nie weryfikuje, czy parametr długości jest nieujemny, co może prowadzić do korupcji pamięci i awarii aplikacji.
Risk Assessment
Podatność ta może prowadzić do usunięcia usługi (denial of service) w aplikacjach, które przekazują niezweryfikowane dane do parametru długości. Choć w typowym użyciu długość jest ustalana przez wywołującego, co zmniejsza ryzyko, to aplikacje z nieufnymi danymi mogą być zagrożone.
Recommendation
Zaleca się aktualizację do wersji Crypt::URandom 0.55 lub nowszej, aby usunąć tę podatność. Dodatkowo, należy wprowadzić walidację danych wejściowych przekazywanych do parametru długości.
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Original NVD description (English source)
Crypt::URandom versions from 0.41 before 0.55 for Perl is vulnerable to a heap buffer overflow in the XS function crypt_urandom_getrandom(). The function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to getrandom(data, length, GRND_NONBLOCK) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service). In common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected.