CVE-2021-41079

Apache Tomcat DoS with unexpected TLS packet

Description

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. 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.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory debian.org Vendor Advisory apache.org
Affected: Apache Software Foundation Apache Tomcat
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3E mailing list vendor advisory
https://lists.debian.org/debian-lts-announce/2021/09/msg00012.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20211008-0005/ third party advisory
https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3E mailing list
https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E mailing list
https://www.debian.org/security/2021/dsa-4986 third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-41079?
CVE-2021-41079 has been scored as a high severity vulnerability.
How to fix CVE-2021-41079?
To fix CVE-2021-41079, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41079 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-41079 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41079?
CVE-2021-41079 affects Apache Software Foundation Apache Tomcat.
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