Upstream information

CVE-2025-13470 at MITRE

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.

SUSE information

Overall state of this security issue: Revisit

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3)
Base Score 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
CVSSv3 Version 3.1
CVSS v4 Scores
CVSS detail CNA (6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3)
Base Score 7.7
Vector 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
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact High
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1253957 [NEW]

No SUSE Security Announcements cross referenced.

SUSE Timeline for this CVE

CVE page created: Wed Nov 19 17:27:33 2025
CVE page last modified: Sat Nov 22 12:34:06 2025