CVE-2021-41079
Apache Tomcat DoS with unexpected TLS packet
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 6.7%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Lifecycle
16 Sep 2021Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
Affected products
Apache Software Foundation · Apache TomcatWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3Ehttps://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3Ehttps://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3Ehttps://lists.debian.org/debian-lts-announce/2021/09/msg00012.htmlhttps://security.netapp.com/advisory/ntap-20211008-0005/https://www.debian.org/security/2021/dsa-4986