QID 730659

Date Published: 2022-11-24

QID 730659: Apache Tomcat Information Disclosure Vulnerability (CVE-2021-43980)

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

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Affected versions:
Apache Tomcat 8.5.0 to 8.5.77

QID Detection Logic (Unauthenticated):
This QID sends a HTTP GET request to an invalid URL and based on the response confirms the vulnerable instance of Apache Tomcat running on the host.

Successful exploitation of this vulnerability could reveal sensitive information to an unauthorized attacker.

CVSS V3 rated as Medium - 3.7 severity.

CVSS V2 rated as Medium - 5.4 severity.

Solution

Customers are advised to upgrade Apache Tomcat to the new version to remediate this vulnerability. For more information please refer to Apache Tomcat Security Advisory.

Vendor References

Apache_Tomcat_8.5.78 - tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.78

CVEs related to QID 730659

CVE-2021-43980 |

Software Advisories

Advisory ID	Software	Component	Link
Apache Tomcat			tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.78

By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].