SB2021052532 - Denial of service in Apache Wicket
Published: May 25, 2021
Security Bulletin ID
SB2021052532
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2021-23937)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in WebClientInfo when processing the "X-Forwarded-For" HTTP header. A remote attacker can force the server to initiate numerous DNS lookups and overload the internal DNS server.
Remediation
Install update from vendor's website.