Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No 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/bf15ddc097176e951659a24a8e9002a7
report@snyk.io
https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef…
report@snyk.io
https://github.com/kjur/jsrsasign/pull/646
report@snyk.io
https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940
report@snyk.io