CVE-2020-14968

CRITICAL

jsrsasign < 8.0.17 - Signature Validation Bypass via Prepended Null Bytes

Title source: llm
STIX 2.1

Description

An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending '\0' bytes to a signature (it accepts these modified signatures as valid). An attacker can abuse this behavior in an application by creating multiple valid signatures where only one signature should exist. Also, an attacker might prepend these bytes with the goal of triggering memory corruption issues.

References (6)

Core 6
Core References
Release Notes, Third Party Advisory x_refsource_misc
https://kjur.github.io/jsrsasign/
Product, Third Party Advisory x_refsource_misc
https://www.npmjs.com/package/jsrsasign
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/kjur/jsrsasign/releases/tag/8.0.18
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/kjur/jsrsasign/releases/tag/8.0.17
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/kjur/jsrsasign/issues/438
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20200724-0001/

Scores

CVSS v3 9.8
EPSS 0.0055
EPSS Percentile 68.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-119
Status published
Products (3)
jsrsasign_project/jsrsasign < 8.0.17
netapp/max_data
npm/jsrsasign 3.0.0 - 8.0.17npm
Published Jun 22, 2020
Tracked Since Feb 18, 2026