Observable Discrepancy Affecting jsrsasign package, versions <11.0.0
Snyk CVSS
Attack Complexity
High
Scope
Changed
Confidentiality
High
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.08% (35th
percentile)
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Test your applications- Snyk ID SNYK-JS-JSRSASIGN-6070731
- published 21 Jan 2024
- disclosed 21 Nov 2023
- credit Hubert Kario
Introduced: 21 Nov 2023
CVE-2024-21484 Open this link in a new tabHow 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.