CVE-2025-13470
HighSummary
W wersji 0.18.0 RNP wystąpił regres w refaktoryzacji, który powoduje, że symetryczny klucz sesji używany dla pakietów Public-Key Encrypted Session Key (PKESK) pozostaje niezainicjowany, z wyjątkiem zera, co skutkuje tym, że zawsze jest to tablica bajtów wypełniona zerami. Jakiekolwiek dane zaszyfrowane przy użyciu szyfrowania kluczem publicznym w tej wersji mogą być łatwo odszyfrowane, co całkowicie kompromituje poufność.
Risk Assessment
Podatność ta wpływa wyłącznie na szyfrowanie kluczem publicznym (pakiety PKESK), co stwarza poważne ryzyko dla poufności danych. Organizacje mogą być narażone na nieautoryzowany dostęp do wrażliwych informacji.
Recommendation
Zaleca się aktualizację do nowszej wersji RNP, która naprawia tę podatność. Należy również rozważyć unikanie używania szyfrowania kluczem publicznym w tej wersji do czasu zastosowania poprawek.
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Original NVD description (English source)
In RNP version 0.18.0 a refactoring regression causes the symmetric session key used for Public-Key Encrypted Session Key (PKESK) packets to be left uninitialized except for zeroing, resulting in it always being an all-zero byte array. Any data encrypted using public-key encryption in this release can be decrypted trivially by supplying an all-zero session key, fully compromising confidentiality. The vulnerability affects only public key encryption (PKESK packets). Passphrase-based encryption (SKESK packets) is not affected. Root cause: Vulnerable session key buffer used in PKESK packet generation. The defect was introduced in commit `7bd9a8dc356aae756b40755be76d36205b6b161a` where initialization logic inside `encrypted_build_skesk()` only randomized the key for the SKESK path and omitted it for the PKESK path.

