CVE-2020-14968 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/kjur/jsrsasign/issues/438 https://github.com/kjur/jsrsasign/releases/tag/8.0.17 https://github.com/kjur/jsrsasign/releases/tag/8.0.18 https://kjur.github.io/jsrsasign/ https://security.netapp.com/advisory/ntap-20200724-0001/ https://www.npmjs.com/package/jsrsasign

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8