SB2020062404 - Improper Verification of Cryptographic Signature in jsrsasign JavaScript library
Published: June 24, 2020
Security Bulletin ID
SB2020062404
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2020-14968)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the RSASSA-PSS (RSA-PSS) implementation does not detect signature manipulation/modification by prepending "\0" bytes to a signature. A remote attacker can create multiple valid signatures and prepend these bytes with the goal of triggering memory corruption issues.
Remediation
Install update from vendor's website.