Remote Code Execution (RCE) Affecting jsrsasign package, versions <8.0.18


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
1.63% (89th percentile)

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  • Snyk IDSNYK-JS-JSRSASIGN-572938
  • published22 Jun 2020
  • disclosed22 Jun 2020
  • creditAntonio de la Piedra

Introduced: 22 Jun 2020

CVE-2020-14968  (opens in a new tab)
CWE-94  (opens in a new tab)

How to fix?

Upgrade jsrsasign to version 8.0.18 or higher.

Overview

jsrsasign is a free pure JavaScript cryptographic library.

Affected versions of this package are vulnerable to Remote Code Execution (RCE). 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

CVSS Scores

version 3.1