7.7

CVE-2025-13470

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.
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HerstellerRibose
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Produkt RNP
Default Statusunaffected
Version 0.18.0
Status affected
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.08
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3 7.7 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:H/U:Red
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-330 Use of Insufficiently Random Values

The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.