Infinite loop in Apache Tomcat - CVE-2020-13935
Published: July 14, 2020 / Updated: June 2, 2022
Vulnerability identifier: #VU29723
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2020-13935
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Apache Foundation
Affected software:
Apache Tomcat
Apache Tomcat
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop when processing payload length in a WebSocket frame. A remote attacker can send a specially crafted request to the application, consume all available system resources and cause denial of service conditions.
How to mitigate CVE-2020-13935
Install updates from vendor's website.