Apache Tomcat 8.5.x < 8.5.13 Multiple Vulnerabilities

critical Web Application Scanning Plugin ID 112304
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Apache Tomcat 8.5.x < 8.5.13 Multiple Vulnerabilities


According to its self-reported version number, the Apache Tomcat service running on the remote host is 8.5.x prior to 8.5.13. It is therefore affected by multiple vulnerabilities :

- A flaw exists in the handling of pipelined requests when send file processing is used that results in the pipelined request being lost when processing of the previous request has completed, causing responses to be sent for the wrong request. An unauthenticated, remote attacker can exploit this to disclose sensitive information. (CVE-2017-5647)

- A flaw exists in the handling of HTTP/2 GOAWAY frames for a connection due to streams associated with the connection not being properly closed if the connection was currently waiting for a WINDOW_UPDATE before allowing the application to write more data. Each stream consumes a processing thread in the system. An unauthenticated, remote attacker can exploit this issue, via a series of specially crafted HTTP/2 requests, to consume all available threads, resulting in a denial of service condition. (CVE-2017-5650)

- A flaw exists in HTTP connectors when processing send files. If processing completed quickly, it was possible to add the processor to the processor cache twice, which allows the same processor to be used for multiple requests. An unauthenticated, remote attacker can exploit this to disclose sensitive information from other sessions or cause unexpected errors. (CVE-2017-5651)

Note that the scanner has not attempted to exploit these issues but has instead relied only on the application's self-reported version number.


Upgrade to Apache Tomcat version 8.5.13 or later.

See Also


Plugin Details

Severity: Critical

ID: 112304

Type: remote

Published: 11/5/2018

Updated: 10/7/2021

Scan Template: scan, pci, api

Risk Information

CVSS Score Source: CVE-2017-5651


Risk Factor: High

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P


Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*

Exploit Ease: No known exploits are available

Patch Publication Date: 4/17/2017

Vulnerability Publication Date: 4/17/2017

Reference Information

CVE: CVE-2017-5647, CVE-2017-5650, CVE-2017-5651