QID 150385

Date Published: 2021-11-10

QID 150385: Apache Tomcat Denial of Service Vulnerability (CVE-2021-41079)

Apache Tomcat is an open source web server and servlet container developed by the Apache Software Foundation.

When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.

Versions Affected:
Apache Tomcat 10.0.0-M1 to 10.0.2
Apache Tomcat 9.0.0-M1 to 9.0.43
Apache Tomcat 8.5.0 to 8.5.63

QID Detection Logic (Unauthenticated):
The QID checks for vulnerable version by sending a GET /QUALYSTESTRANDOM.1tmhl HTTP/1.0 request which helps in retrieving the installed version of Apache Tomcat in the banner of the response.

An attacker can craft packet to trigger an infinite loop resulting in a denial of service.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 4.3 severity.

Solution

Upgrade to the Apache Tomcat 10.0.4, 9.0.44 , 8.5.64 versions or to the latest version of Apache Tomcat. Please refer to Apache Tomcat Security Advisory.

Vendor References

Apache_Tomcat - tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.4

CVEs related to QID 150385

CVE-2021-41079 |

Software Advisories

Advisory ID	Software	Component	Link
Apache_Tomcat			tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.4

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