Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations (e.g., verify and encryption) to collapse to deterministic zero outputs and hide “invalid key” errors by supplying a JWK whose modulus decodes to zero.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Jsrsasign_Project Jsrsasign
cpe:2.3:a:jsrsasign_project:jsrsasign:*:*:*:*:*:node.js:*:*
|
— |
11.1.1
|
References 4
https://gist.github.com/Kr0emer/5366b7364c4fbf7e754bc377f321e9f3
report@snyk.io
https://github.com/kjur/jsrsasign/commit/dc41d49fac4297e7a737a3ef8ebd0aa9c49ef9…
report@snyk.io
https://github.com/kjur/jsrsasign/pull/649
report@snyk.io
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371176
report@snyk.io