CVE-2023-42795

Incomplete Cleanup vulnerability in Apache Tomcat.

When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

The Apache Tomcat software is developed in an open and participatory environment and released under the Apache License version 2. The Apache Tomcat project is intended to be a collaboration of the best-of-breed developers from around the world. We invite you to participate in this open development project

Security Fix(es):

Apache Commons FileUpload before 1.5 does not limit the number of request parts to be processed resulting in the possibility of an attacker triggering a DoS with a malicious upload or series of uploads.

Note that, like all of the file upload limits, the new configuration option (FileUploadBase#setFileCountMax) is not enabled by default and must be explicitly configured.

(CVE-2023-24998)

The fix for CVE-2023-24998 was incomplete for Apache Tomcat 11.0.0-M2 to 11.0.0-M4, 10.1.5 to 10.1.7, 9.0.71 to 9.0.73 and 8.5.85 to 8.5.87. If non-default HTTP connector settings were used such that the maxParameterCount could be reached using query string parameters and a request was submitted that supplied exactly maxParameterCount parameters in the query string, the limit for uploaded request parts could be bypassed with the potential for a denial of service to occur.

(CVE-2023-28709)

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next.

Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

(CVE-2023-42795)

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

Security Fix(es):

• tomcat: Open Redirect vulnerability in FORM authentication (CVE-2023-41080)
• tomcat: FileUpload: DoS due to accumulation of temporary files on Windows (CVE-2023-42794)
• tomcat: improper cleaning of recycled objects could lead to information leak (CVE-2023-42795)
• tomcat: incorrectly parsed http trailer headers can cause request smuggling (CVE-2023-45648)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages (JSP) technologies.

Security Fix(es):

• tomcat: Open Redirect vulnerability in FORM authentication (CVE-2023-41080)
• tomcat: FileUpload: DoS due to accumulation of temporary files on Windows (CVE-2023-42794)
• tomcat: improper cleaning of recycled objects could lead to information leak (CVE-2023-42795)
• tomcat: incorrectly parsed http trailer headers can cause request smuggling (CVE-2023-45648)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0 through 11.0.0, from 10.1.0 through 10.1.13, from 9.0.0 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Older, EOL versions may also be affected.

Users are recommended to upgrade to version 11.0.0 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue.

• SECURITY UPDATE: Information Disclosure
  • debian/patches/CVE-2023-42795.patch: Improve handling of failures during recycle() methods
  • CVE-2023-42795

• CVE-2023-42795: improve handling of failures during recycle() methods

• SECURITY UPDATE: Incomplete Cleanup vulnerability in Tomcat
  • debian/patches/CVE-2023-42795.patch: Improve handling of failures during recycle() methods
  • CVE-2023-42795

TuxCare rebuilt 5 packages to address 18 CVEs. Fixed in 9.0.75-tuxcare.1.

TuxCare rebuilt 4 packages to address 1 CVE. Fixed in 9.0.50-tuxcare.3.

TuxCare rebuilt 5 packages to address 2 CVEs. Fixed in 9.0.46-tuxcare.6.

TuxCare rebuilt 8 packages to address 32 CVEs. Fixed in 9.0.24-tuxcare.1.

TuxCare rebuilt 5 packages to address 26 CVEs. Fixed in 9.0.39-tuxcare.2.

TuxCare rebuilt 7 packages to address 22 CVEs. Fixed in 9.0.13-tuxcare.2.

The updated packages fix security vulnerabilities:

Incomplete Cleanup vulnerability in Apache Tomcat.When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. (CVE-2023-42795)

Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. (CVE-2023-45648)

These are all security issues fixed in the tomcat-9.0.82-2.1 package on the GA media of openSUSE Tumbleweed.

This update for tomcat fixes the following issues:

• CVE-2023-42795: Fixed a potential information leak due to insufficient cleanup (bsc#1216119).
• CVE-2023-45648: Fixed a request smuggling issue due to an incorrect parsing of HTTP trailer headers (bsc#1216118).

This update for tomcat fixes the following issues:

• CVE-2023-42795: Fixed a potential information leak due to insufficient cleanup (bsc#1216119).
• CVE-2023-45648: Fixed a request smuggling issue due to an incorrect parsing of HTTP trailer headers (bsc#1216118).
• CVE-2023-41080: Fixed URL Redirection to Untrusted Site ('Open Redirect') vulnerability in FORM authentication feature (bsc#1214666).

This update for tomcat fixes the following issues:

Updated to Tomcat 9.0.85:

• CVE-2023-45648: Improve trailer header parsing (bsc#1216118).
• CVE-2023-42794: FileUpload: remove tmp files to avoid DoS on Windows (bsc#1216120).
• CVE-2023-42795: Improve handling of failures during recycle() methods (bsc#1216119).
• CVE-2023-46589: Fixed HTTP request smuggling due to incorrect headers parsing (bsc#1217649)
• CVE-2024-22029: Fixed escalation to root from tomcat user via %post script. (bsc#1219208)

The following non-security issues were fixed:

• Fixed the file permissions for server.xml (bsc#1217768, bsc#1217402).

Find the full release notes at:

https://tomcat.apache.org/tomcat-9.0-doc/changelog.html

This update for tomcat fixes the following issues:

Update to Tomcat 9.0.115:

• CVE-2025-48989: HTTP/2 protocol (including DNS over HTTPS) is vulnerable to 'MadeYouReset' DoS attack (bsc#1243895).
• CVE-2025-52434: race condition on connection close when using the APR/Native connector could lead to a JVM crash (bsc#1246389).
• CVE-2025-53506: uncontrolled resource HTTP/2 client consumption vulnerability (bsc#1246318).
• CVE-2025-66614: client certificate verification bypass due to virtual host mapping (bsc#1258371).
• CVE-2026-24733: improper input validation on HTTP/0.9 requests (bsc#1258385).
• CVE-2023-44487: Rapid reset attack (bsc#1216182).

It was discovered that Tomcat did not include the secure attribute for session cookies when using the RemoteIpFilter with requests from a reverse proxy. An attacker could possibly use this issue to leak sensitive information. (CVE-2023-28708)

It was discovered that Tomcat had a vulnerability in its FORM authentication feature, leading to an open redirect attack. An attacker could possibly use this issue to perform phishing attacks. (CVE-2023-41080)

It was discovered that Tomcat incorrectly recycled certain objects, which could lead to information leaking from one request to the next. An attacker could potentially use this issue to leak sensitive information. (CVE-2023-42795)

It was discovered that Tomcat incorrectly handled HTTP trailer headers. A remote attacker could possibly use this issue to perform HTTP request smuggling. (CVE-2023-45648)

It was discovered that Tomcat incorrectly handled socket cleanup, which could lead to websocket connections staying open. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-23672)

It was discovered that Tomcat did not include the secure attribute for session cookies when using the RemoteIpFilter with requests from a reverse proxy. An attacker could possibly use this issue to leak sensitive information. This issue was fixed for tomcat8 on Ubuntu 18.04 LTS and for tomcat9 on Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2023-28708)

It was discovered that Tomcat incorrectly recycled certain objects, which could lead to information leaking from one request to the next. An attacker could potentially use this issue to leak sensitive information. This issue was fixed for tomcat8 on Ubuntu 18.04 LTS and for tomcat9 on Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2023-42795)

It was discovered that Tomcat incorrectly handled HTTP trailer headers. A remote attacker could possibly use this issue to perform HTTP request smuggling. This issue was fixed for tomcat8 on Ubuntu 18.04 LTS and for tomcat9 on Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04. (CVE-2023-45648)

It was discovered that Tomcat incorrectly handled incomplete POST requests, which could cause error responses to contain data from previous requests. An attacker could potentially use this issue to leak sensitive information. This issue was fixed for tomcat8 on Ubuntu 18.04 LTS and for tomcat9 on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2024-21733)

It was discovered that Tomcat incorrectly handled socket cleanup, which could lead to websocket connections staying open. An attacker could possibly use this issue to cause a denial of service. This issue was fixed for tomcat8 on Ubuntu 18.04 LTS, tomcat9 on Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04, and for tomcat10 on Ubuntu 24.04 LTS. (CVE-2024-23672)

It was discovered that Tomcat incorrectly handled HTTP/2 requests that exceeded configured header limits. An attacker could possibly use this issue to cause a denial of service. (CVE-2024-24549)

It was discovered that Tomcat incorrectly handled some cases of excessive HTTP headers when processing HTTP/2 streams. This led to miscounting of active streams and incorrect timeout handling. An attacker could possibly use this issue to cause connections to remain open indefinitely, leading to a denial of service. This issue was fixed for tomcat9 on Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04, and for tomcat10 on Ubuntu 24.04 LTS. (CVE-2024-34750)

It was discovered that Tomcat incorrectly handled TLS handshake processes under certain configurations. An attacker could possibly use this issue to cause a denial of service. This issue was fixed for tomcat9 on Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04, and for tomcat10 on Ubuntu 24.04 LTS. (CVE-2024-38286)