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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

21 Nov 2025, 18:15

Type	Values Removed	Values Added
References	~~{'url': 'https://cve.ribose.com/advisories/ra-2025-11-20/', 'source': '6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3'}~~	() https://open.ribose.com/advisories/ra-2025-11-20/ -

21 Nov 2025, 17:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-11-21 17:15

Updated : 2025-11-25 22:16

NVD link : CVE-2025-13470

Mitre link : CVE-2025-13470

CVE.ORG link : CVE-2025-13470

JSON object : View

Products Affected

No product.

CWE

CWE-330

Use of Insufficiently Random Values

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