CVE-2025-13470

Nov. 21, 2025, 6:15 p.m.

7.7
High

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.

Product(s) Impacted

Vendor Product Versions
Rnp
  • Rnp
  • 0.18.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-330
Use of Insufficiently Random Values
The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a rnp rnp 0.18.0 / / / / / / /

References

https://access.redhat.com/security/cve/cve-2025-13402
https://aur.archlinux.org/packages/rnp
https://bugzilla.redhat.com/show_bug.cgi?id=2415863
https://github.com/rnpgp/rnp/commit/7bd9a8dc356aae756b40755be76d36205b6b161a
https://github.com/rnpgp/rnp/releases/tag/v0.18.1
https://launchpad.net/ubuntu/+source/rnp
https://open.ribose.com/advisories/ra-2025-11-20/
https://packages.gentoo.org/packages/dev-util/librnp

Tags

CWE-330
2025-11-21
CVE-2025-13470
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3

CVSS Score

7.7 / 10

CVSS Data - 4.0

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Attack Requirements: NONE
  • Privileges Required: NONE
  • User Interaction: NONE
  • Scope:
  • Confidentiality Impact: HIGH
  • Integrity Impact: NONE
  • Availability Impact: NONE
  • Exploit Maturity: PROOF_OF_CONCEPT

    • 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

    View Vector String

Timeline

Published: Nov. 21, 2025, 5:15 p.m.
Last Modified: Nov. 21, 2025, 6:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.