CVE-2021-41079: Apache Tomcat DoS with unexpected TLS packet
First published: Wed Sep 15 2021(Updated: )
A flaw was found in Apache Tomcat. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet can trigger an infinite loop, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Credit: security@apache.org security@apache.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/jws5-tomcat | <0:9.0.43-13.redhat_00013.1.el7 | 0:9.0.43-13.redhat_00013.1.el7 |
| redhat/jws5-tomcat | <0:9.0.43-13.redhat_00013.1.el8 | 0:9.0.43-13.redhat_00013.1.el8 |
| Apache Tomcat | >=8.5.0<8.5.64 | |
| Apache Tomcat | >=9.0.0<9.0.44 | |
| Apache Tomcat | >=10.0.0<=10.0.2 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Netapp Management Services For Element Software And Netapp Hci | ||
| redhat/tomcat | <10.0.4 | 10.0.4 |
| redhat/tomcat | <9.0.44 | 9.0.44 |
| redhat/tomcat | <8.5.64 | 8.5.64 |
| IBM DRM | <=2.0.6 | |
| debian/tomcat9 | 9.0.43-2~deb11u10 9.0.70-2 9.0.95-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-41079 https://nvd.nist.gov/vuln/detail/CVE-2021-41079 https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3E https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.4 https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.64 https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.44
- https://bugzilla.redhat.com/show_bug.cgi?id=2004820
- https://access.redhat.com/errata/RHSA-2022:5532
- https://access.redhat.com/errata/RHSA-2021:3743
- https://access.redhat.com/errata/RHSA-2021:3741
- https://access.redhat.com/errata/RHSA-2022:1179
- https://access.redhat.com/security/cve/cve-2021-41079
- https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a@%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2021/09/msg00012.html
- https://security.netapp.com/advisory/ntap-20211008-0005/
- https://www.debian.org/security/2021/dsa-4986
- https://launchpad.net/bugs/cve/CVE-2021-41079
- https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3E
- https://github.com/apache/tomcat/commit/34115fb3c83f6cd97772232316a492a4cc5729e0
- https://github.com/apache/tomcat/commit/d4b340fa8feaf55831f9a59350578f7b6ca048b8
- https://github.com/apache/tomcat/commit/b90d4fc1ff44f30e4b3aba622ba6677e3f003822
- https://access.redhat.com/support/policy/updates/jboss_notes
- https://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.4
- https://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.44
- https://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.64
- https://tomcat.apache.org/whichversion.html#Apache_Tomcat_8.x
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2005887
- https://security-tracker.debian.org/tracker/CVE-2021-41079
- https://exchange.xforce.ibmcloud.com/vulnerabilities/209450
- https://www.ibm.com/support/pages/node/6497499 (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41079
- https://nvd.nist.gov/vuln/detail/CVE-2021-41079
- https://ubuntu.com/security/CVE-2021-41079
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-41079.
What is the severity of CVE-2021-41079?
The severity of CVE-2021-41079 is high with a CVSS score of 7.5.
What is the affected software?
The affected software includes Apache Tomcat versions 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43, and 10.0.0-M1 to 10.0.2.
How can I fix CVE-2021-41079?
To fix CVE-2021-41079, you need to update Apache Tomcat to version 10.0.4, 9.0.44, or 8.5.64, depending on the version you are using.
Where can I find more information about CVE-2021-41079?
You can find more information about CVE-2021-41079 in the references section.
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-41079
- agent/software-canonical-lookup
- agent/severity
- agent/weakness
- collector/ibm-support
- source/IBM
- collector/mitre-cve
- source/MITRE
- agent/title
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/tags
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/nvd-cve
- source/NVD
- agent/last-modified-date
- agent/trending
- package-manager/redhat
- vendor/apache
- canonical/apache tomcat
- version/apache tomcat/8.5.0
- version/apache tomcat/9.0.0
- version/apache tomcat/10.0.0
- version/apache tomcat/10.0.2
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- version/debian debian linux/11.0
- vendor/netapp
- canonical/netapp management services for element software and netapp hci
- vendor/ibm
- canonical/ibm drm
- version/ibm drm/2.0.6
- package-manager/debian