High severity7.5NVD Advisory· Published Sep 16, 2021· Updated Jun 17, 2026
CVE-2021-41079
CVE-2021-41079
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.tomcat:tomcatMaven | >= 10.0.0, < 10.0.4 | 10.0.4 |
org.apache.tomcat:tomcatMaven | >= 9.0.0, < 9.0.44 | 9.0.44 |
org.apache.tomcat:tomcatMaven | >= 8.5.0, < 8.5.64 | 8.5.64 |
Affected products
33- osv-coords32 versionspkg:bitnami/tomcatpkg:maven/org.apache.tomcat/tomcatpkg:rpm/opensuse/tomcat10&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/tomcat&distro=openSUSE%20Leap%2015.3pkg:rpm/opensuse/tomcat&distro=openSUSE%20Tumbleweedpkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/javapackages-tools&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/javapackages-tools&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/javapackages-tools&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/tomcat&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP2pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Web%20and%20Scripting%2015%20SP3pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/tomcat&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/tomcat&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209
>= 8.5.0, < 8.5.64+ 31 more
- (no CPE)range: >= 8.5.0, < 8.5.64
- (no CPE)range: >= 10.0.0, < 10.0.4
- (no CPE)range: < 10.1.14-1.1
- (no CPE)range: < 9.0.36-lp152.2.25.1
- (no CPE)range: < 9.0.36-13.1
- (no CPE)range: < 9.0.43-2.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 2.0.1-13.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-13.1
- (no CPE)range: < 9.0.36-13.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.115-3.160.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.84.1
- (no CPE)range: < 9.0.36-4.63.1
- (no CPE)range: < 9.0.115-3.160.1
- (no CPE)range: < 9.0.36-3.71.1
- (no CPE)range: < 9.0.36-3.71.1
- Apache Software Foundation/Apache Tomcatv5Range: Apache Tomcat 8.5 8.5.0 to 8.5.63
Patches
Vulnerability mechanics
References
12- github.com/advisories/GHSA-59g9-7gfx-c72pghsaADVISORY
- lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3EnvdMailing ListVendor AdvisoryWEB
- lists.debian.org/debian-lts-announce/2021/09/msg00012.htmlnvdMailing ListThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-41079ghsaADVISORY
- security.netapp.com/advisory/ntap-20211008-0005/nvdThird Party Advisory
- www.debian.org/security/2021/dsa-4986nvdThird Party AdvisoryWEB
- github.com/apache/tomcat/commit/34115fb3c83f6cd97772232316a492a4cc5729e0ghsaWEB
- lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a@%3Cusers.tomcat.apache.org%3EghsaWEB
- lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe@%3Cdev.tomcat.apache.org%3EghsaWEB
- security.netapp.com/advisory/ntap-20211008-0005ghsaWEB
- lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3Envd
- lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3Envd
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