CVE-2025-13470
RNP 0.18.0 Vulnerable PKESK session keys
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.
INFO
Published Date :
Nov. 21, 2025, 5:15 p.m.
Last Modified :
Nov. 21, 2025, 5:15 p.m.
Remotely Exploit :
Yes !
Source :
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3
Affected Products
The following products are affected by CVE-2025-13470
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3 | ||||
| CVSS 4.0 | HIGH | 6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3 | ||||
| CVSS 4.0 | HIGH | 6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3 |
Solution
- Update RNP to a fixed version.
- Verify session key initialization logic.
- Re-encrypt sensitive data if necessary.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-13470.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-13470 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-13470
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-13470 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-13470 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3
Nov. 21, 2025
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-330 Added Reference https://access.redhat.com/security/cve/cve-2025-13402 Added Reference https://aur.archlinux.org/packages/rnp Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2415863 Added Reference https://cve.ribose.com/advisories/ra-2025-11-20/ Added Reference https://github.com/rnpgp/rnp/commit/7bd9a8dc356aae756b40755be76d36205b6b161a Added Reference https://github.com/rnpgp/rnp/releases/tag/v0.18.1 Added Reference https://launchpad.net/ubuntu/+source/rnp Added Reference https://packages.gentoo.org/packages/dev-util/librnp