Observable Discrepancy Affecting jsrsasign package, versions <11.0.0


Severity

Recommended
0.0
high
0
10

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

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.08% (37th percentile)

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  • Snyk IDSNYK-JS-JSRSASIGN-6070731
  • published21 Jan 2024
  • disclosed21 Nov 2023
  • creditHubert Kario

Introduced: 21 Nov 2023

CVE-2024-21484  (opens in a new tab)
CWE-203  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade jsrsasign to version 11.0.0 or higher.

Overview

jsrsasign is a free pure JavaScript cryptographic library.

Affected versions of this package are vulnerable to Observable Discrepancy via the RSA PKCS#1.5 or RSAOAEP decryption process. An attacker can decrypt ciphertexts by exploiting the Marvin security flaw. Exploiting this vulnerability requires the attacker to have access to a large number of ciphertexts encrypted with the same key.

Workaround

The vulnerability can be mitigated by finding and replacing RSA and RSAOAEP decryption with another crypto library.

CVSS Scores

version 3.1