Description
When using FORM authentication with Apache Tomcat 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49 and 7.0.0 to 7.0.98 there was a narrow window where an attacker could perform a session fixation attack. The window was considered too narrow for an exploit to be practical but, erring on the side of caution, this issue has been treated as a security vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 9.0.0.M1 to 9.0.29, 8.5.0 to 8.5.49, 7.0.0 to 7.0.98 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tomcat9 | 9.0.31-1 | — |
| Debian 13 | tomcat9 | 9.0.31-1 | — |
| Debian 12 | tomcat9 | 9.0.31-1 | — |
| Debian 10 | tomcat9 | 9.0.31-1~deb10u1 | DSA-4680-1 |
| Debian 9 | tomcat8 | 8.5.50-0+deb9u1 | DSA-4596-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | tomcat7 | 7.0.56-3+really7.0.99-1 | DLA-2077-1 |
| Debian 8 | tomcat8 | 8.0.14-1+deb8u17 | DLA-2209-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | tomcat8 | 8.0.32-1ubuntu1.11 | USN-4251-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | tomcat8 +1 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | tomcat7 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | tomcat7 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | tomcat +9 | 7.0.76-15.el7 | RHSA-2020:4004 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 EUS | tomcat +9 | 7.0.76-12.el7_7 | RHSA-2021:1030 |
| RHEL 7.6 EUS | tomcat +9 | 7.0.76-11.el7_6 | RHSA-2021:0882 |
| Red Hat JBoss Web Server 5 | jws5-tomcat +9 | 9.0.30-3.redhat_4.1.el6jws | RHSA-2020:1520 |
| Red Hat JBoss Web Server 5 | jws5-tomcat-native | 1.2.23-4.redhat_4.el6jws | RHSA-2020:1520 |
| Red Hat JBoss Web Server 3 | tomcat-native | 1.2.23-21.redhat_21.ep7.el6 | RHSA-2020:0861 |
| Red Hat JBoss Web Server 3 | tomcat7 +11 | 7.0.70-38.ep7.el6 | RHSA-2020:0861 |
| Red Hat JBoss Web Server 3 | tomcat8 +11 | 8.0.36-42.ep7.el6 | RHSA-2020:0861 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | tomcat | 9.0.30-4.10.1 | SUSE-SU-2020:0029-1 |
| SLES 15 | tomcat | 9.0.30-3.34.1 | SUSE-SU-2020:0226-1 |
| SLES 12 SP5 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES 12 SP4 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES 12 SP3 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SLES 12 SP1 | tomcat | 8.0.53-10.43.1 | SUSE-SU-2020:1497-1 |
| SLES for SAP 12 SP5 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES for SAP 12 SP4 | tomcat | 9.0.31-3.25.1 | SUSE-SU-2020:0632-1 |
| SLES for SAP 12 SP3 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SLES for SAP 12 SP2 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SLES for SAP 12 SP1 | tomcat | 8.0.53-10.43.1 | SUSE-SU-2020:1497-1 |
| SUSE OpenStack Cloud Crowbar 8 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE OpenStack Cloud 8 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE OpenStack Cloud 7 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE HPE Helion OpenStack 8 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
| SUSE Enterprise Storage 5 | tomcat | 8.0.53-29.27.1 | SUSE-SU-2020:1498-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.36-8.4 | openSUSE-SU-2024:11468-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.14-1.1 | openSUSE-SU-2024:13441-1 |
| openSUSE Leap 15.1 | tomcat | 9.0.30-lp151.3.6.1 | openSUSE-SU-2020:0038-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | tomcat +9 | 7.0.76-10.amzn2.0.4 | ALAS2-2023-2047 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | tomcat +9 | 7.0.76-15.el7 | ELSA-2020-4004 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat.embed:tomcat-embed-core | < 7.0.99 | 7.0.99 | GHSA-9xcj-c8cr-8c3c |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 8.0.0, < 8.5.50 | 8.5.50 | GHSA-9xcj-c8cr-8c3c |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.0, < 9.0.30 | 9.0.30 | GHSA-9xcj-c8cr-8c3c |
Advisories 23
- RHSA-2021:1030 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2021:0882 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:4004 Red Hat Security Advisory: tomcat security and bug fix update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:1520 Red Hat Security Advisory: Red Hat JBoss Web Server 5.3 release Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:0861 Red Hat Security Advisory: Red Hat JBoss Web Server 3.1 Service Pack 8 security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-4251-1 tomcat8 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4680-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4596-1 tomcat8 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2209-1 tomcat8 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2077-1 tomcat7 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:0632-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0029-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0226-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11468-1 tomcat-9.0.36-8.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0038-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1497-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1498-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13441-1 tomcat10-10.1.14-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0528 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 29, 2024
- WID-SEC-2023-1229 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023
- ALAS2-2023-2047 Important: tomcat security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 16, 2023
- WID-SEC-2023-1049 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 20, 2023
- ELSA-2020-4004 Important: tomcat security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
References
- DSA-4596 vendor-advisory
- 20191229 [SECURITY] [DSA 4596-1] tomcat8 security update mailing-list
- openSUSE-SU-2020:0038 vendor-advisory
- [debian-lts-announce] 20200127 [SECURITY] [DLA 2077-1] tomcat7 security update mailing-list
- USN-4251-1 vendor-advisory
- [tomcat-dev] 20200203 svn commit: r1873527 [24/30] - /tomcat/site/trunk/docs/ mailing-list
- [tomcat-dev] 20200203 svn commit: r1873527 [25/30] - /tomcat/site/trunk/docs/ mailing-list
- [tomcat-dev] 20200213 svn commit: r1873980 [27/34] - /tomcat/site/trunk/docs/ mailing-list
- [tomcat-dev] 20200213 svn commit: r1873980 [28/34] - /tomcat/site/trunk/docs/ mailing-list
- [tomcat-dev] 20200213 svn commit: r1873980 [29/34] - /tomcat/site/trunk/docs/ mailing-list
- GLSA-202003-43 vendor-advisory
- DSA-4680 vendor-advisory
- [debian-lts-announce] 20200528 [SECURITY] [DLA 2209-1] tomcat8 security update mailing-list
- https://www.oracle.com/security-alerts/cpuapr2020.html
- [cxf-issues] 20200618 [jira] [Created] (FEDIZ-249) Relying party rejects a valid security token and redirects back to ADFS when using Fediz 1.4.6 with Tomcat 8.5.56 mailing-list
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://lists.apache.org/thread.html/8b4c1db8300117b28a0f3f743c0b9e3f964687a690cdf9662a884bbd%40%3Cannounce.tomcat.apache.org%3E
- https://security.netapp.com/advisory/ntap-20200107-0001/
- https://www.oracle.com/security-alerts/cpujan2021.html