Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types due to handling negative exponents in ext/jsbn2.js. An attacker can force the computation of incorrect modular inverses and break signature verification by calling modPow with a negative exponent.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
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
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
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/7ecd2be7d17419e4677315ef3758faf5
report@snyk.io
https://github.com/kjur/jsrsasign/commit/5ea1c32bb2aa894b4bd29849839afe4f987281…
report@snyk.io
https://github.com/kjur/jsrsasign/pull/650
report@snyk.io
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371175
report@snyk.io