CVE-2020-14968

Name: CVE-2020-14968
Creator: NVD / NIST
Published: 2020-06-22T12:15:10.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.93%

Last modified Jun 22, 2026

CVE-2020-14968 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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). EPSS estimates a 2.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.93%

85.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Kjur	Jsrsasign	< 8.0.17
Netapp	Max Data	All versions

References

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

Timeline

Published: Jun 22, 2020
Last Modified: Jun 22, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-14968?

How severe is CVE-2020-14968?

CVE-2020-14968 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.93% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14968?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-14968?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST