CVE-2021-41079
Apache Tomcat DoS with unexpected TLS packet
- State
- Published
- Severity
- Not scored
- Published
- Sep 16, 2021
- Updated
- Oct 8, 2026
- Reserved
- Sep 15, 2021
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.
Scores
The record has no CVSS score.
Weaknesses
- CWE-20 Improper Input Validation
Affected Products
| Product | Versions |
|---|---|
Apache TomcatApache Software Foundation |
|
References
- https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3E
- [debian-lts-announce] 20210922 [SECURITY] [DLA 2764-1] tomcat8 security updatemailing-list
- https://security.netapp.com/advisory/ntap-20211008-0005/
- [tomcat-dev] 20211014 [SECURITY] CVE-2021-42340 Apache Tomcat DoSmailing-list
- [tomcat-users] 20211014 [SECURITY] CVE-2021-42340 Apache Tomcat DoSmailing-list
- DSA-4986vendor-advisory
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