CVEvulnerability

CVE-2025-13470

7.7 HIGH Published 2025-11-21 Modified 2026-10-08 Official page ↗
Status
Deferred
Published
2025-11-21
Last modified
2026-10-08
Assigner
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3
CVSS 4.0 (6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3)
7.7 HIGH — 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
CVSS 3.1 (6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-330

Description

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.

Related

Weakness · CWE (1)

  • CWE-330 Use of Insufficiently Random Values weakness

References