CVE-2020-14967

Name: CVE-2020-14967
Creator: NVD / NIST
Published: 2020-06-22T12:15:10.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.59%

Last modified Jun 22, 2026

CVE-2020-14967 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in the jsrsasign package before 8.0.18 for Node.js. Its RSA PKCS1 v1.5 decryption implementation does not detect ciphertext modification by prepending '\0' bytes to ciphertexts (it decrypts modified ciphertexts without error). EPSS estimates a 2.59% chance of exploitation in the next 30 days.

Description

An issue was discovered in the jsrsasign package before 8.0.18 for Node.js. Its RSA PKCS1 v1.5 decryption implementation does not detect ciphertext modification by prepending '\0' bytes to ciphertexts (it decrypts modified ciphertexts without error). 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

2.59%

83.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Kjur	Jsrsasign	< 8.0.18
Netapp	Max Data	All versions

References

https://github.com/kjur/jsrsasign/issues/439Exploit, 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/439Exploit, 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-2020-14967?

How severe is CVE-2020-14967?

CVE-2020-14967 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-14967?

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-2020-14967?

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

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Source: NVD / NIST