Improper input validation in Apache Tomcat
CVE-2021-41079
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.072 (93.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Apache Tomcat
- Apache Software Foundation Tomcat — versions Apache Tomcat 8.5 8.5.0 to 8.5.63, Apache Tomcat 9 9.0.0-M1 to 9.0.43, Apache Tomcat 10 10.0.0-M1 to 10.0.2
- Netapp Management_services_for_element_software_and_netapp_hci
- Debian Debian_linux — versions 9.0, 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2021-41079?
- CVE-2021-41079 is a high-severity vulnerability in Apache Tomcat, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-09-16.
- How severe is CVE-2021-41079?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-41079 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.