QID 730013

Date Published: 2021-04-05

QID 730013: Apache Tomcat HTTP2 Client Information Disclosure Vulnerability(CVE-2020-13943)

Apache Tomcat is an open source web server and servlet container developed by the Apache Software Foundation.
If an HTTP/2 client exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.

Affected Versions:
Apache Tomcat 10.0.0-M1 to 10.0.0-M7 Apache Tomcat 9.0.0.M5 to 9.0.37 Apache Tomcat 8.5.1 to 8.5.57 QID Detection Logic:
The QID checks for vulnerable version by sending a GET /QUALYS13813 HTTP/1.0 request which helps in retrieving the installed version of Apache Tomcat in the banner of the response.

This vulnerability could be exploited to gain access to sensitive information.

CVSS V3 rated as Medium - 4.3 severity.

CVSS V2 rated as Medium - 4 severity.

Solution

Upgrade to the Apache Tomcat 10.0.0-M8, 9.0.38,8.5.58 or later version. Please refer to Apache Tomcat Website.

Vendor References

Apache Tomcat - lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E

CVEs related to QID 730013

CVE-2020-13943 |

Software Advisories

Advisory ID	Software	Component	Link
Apache Tomcat			lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E

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