CVE-2021-25122

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

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):

The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41, 8.5.0 to 8.5.61 or 7.0.0. to 7.0.107 with a configuration edge case that was highly unlikely to be used, the Tomcat instance was still vulnerable to CVE-2020-9494. Note that both the previously published prerequisites for CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue.(CVE-2021-25329)

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.(CVE-2021-25122)

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

When responding to new h2c connection requests, Apache Tomcat versions 9.0.0 through 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

• SECURITY UPDATE: Apache Tomcat h2c request mix-up
  • debian/patches/CVE-2021-25122.patch: Simplify the code and fix an edge case for BZ 64830
  • CVE-2021-25122
• SECURITY UPDATE: Denial of Service for NIO+OpenSSL or NIO2+OpenSSL TLS configurations
  • debian/patches/CVE-2021-41079.patch: Improve robustness
  • CVE-2021-41079

• SECURITY UPDATE: Misc vulnerability fixes
  • CVE-2019-12418, CVE-2019-17563, CVE-2020-1935, CVE-2020-11996, CVE-2020-13934, CVE-2020-13935, CVE-2020-13943, CVE-2020-17527, CVE-2021-24122, CVE-2021-30639, CVE-2021-30640, CVE-2021-33037, CVE-2021-42340, CVE-2021-43980, CVE-2022-25762, CVE-2022-34305, CVE-2022-45143, CVE-2023-24998, CVE-2023-28709, CVE-2023-34981, CVE-2023-42794, CVE-2024-21733
• Update to 8.5.100
  • debian/rules, debian/libtomcat8-java.poms, debian/maven.rules, debian/tomcat8-common.links, debian/patches/0018-fix-manager-webapp.patch, debian/patches/0019-add-distribution-to-error-page.patch, debian/patches/0021-dont-test-unsupported-ciphers.patch, debian/patches/0101-skipping-tests-incompatible-with-firewall.patch: updated
  • debian/patches/0002-do-not-load-AJP13-connector-by-default.patch, debian/patches/0026-easymock4-compatibility.patch: removed as they were applied in upstream
  • CVE-2019-0221.patch, CVE-2019-10072-1.patch, CVE-2019-10072-2.patch, CVE-2022-42252.patch, CVE-2020-1938.patch, CVE-2021-25122.patch, CVE-2021-41079.patch, CVE-2022-29885.patch, CVE-2020-9484.patch, CVE-2021-25329-pre1.patch, CVE-2021-25329.patch, CVE-2022-23181.patch, CVE-2023-44487.patch, CVE-2023-46589-pre1.patch, CVE-2023-46589-pre2.patch, CVE-2023-46589-pre3.patch, CVE-2023-46589-pre4.patch, CVE-2023-46589.patch: removed because these CVEs were fixed in upstream
• Internal tests
  • debian/test_certs/*: updated from upstream branch 9.0.x, as the 8.0.x certs were expired

When responding to new h2c connection requests, Apache Tomcat versions 9.0.0.M1 to 9.0.41 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request (CVE-2021-25122).

The fix for CVE-2020-9484 was incomplete. When using Apache Tomcat 9.0.0.M1 to 9.0.41 with a configuration edge case that was highly unlikely to be used, the Tomcat instance was still vulnerable to CVE-2020-9494 (CVE-2021-25329).

This update for tomcat fixes the following issues:

CVE-2021-25122: Apache Tomcat h2c request mix-up (bsc#1182912) CVE-2021-25329: Complete fix for CVE-2020-9484 (bsc#1182909)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

These are all security issues fixed in the tomcat-9.0.36-8.4 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the tomcat10-10.1.14-1.1 package on the GA media of openSUSE Tumbleweed.

Root has patched CVE-2021-25122 in the io.root.org.apache.tomcat.embed:tomcat-embed-core package for Root:Maven. Multiple fixed versions available.

This update for tomcat fixes the following issues:

• CVE-2021-25122: Apache Tomcat h2c request mix-up (bsc#1182912)
• CVE-2021-25329: Complete fix for CVE-2020-9484 (bsc#1182909)

This update for tomcat fixes the following issues:

• Fixed CVEs:
  • CVE-2021-25122: Apache Tomcat h2c request mix-up (bsc#1182912)
  • CVE-2021-25329: Complete fix for CVE-2020-9484 (bsc#1182909)
• Log if file access is blocked due to symlinks: CVE-2021-24122 (bsc#1180947)

This update for tomcat fixes the following issues:

CVE-2021-25122: Apache Tomcat h2c request mix-up (bsc#1182912) CVE-2021-25329: Complete fix for CVE-2020-9484 (bsc#1182909)

This update for tomcat fixes the following issues:

• CVE-2021-24122: Fixed an information disclosure if resources are served from the NTFS file system (bsc#1180947).
• CVE-2021-25122: Apache Tomcat h2c request mix-up (bsc#1182912)
• CVE-2021-25329: Complete fix for CVE-2020-9484 (bsc#1182909)

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 incorrectly performed input verification. A remote attacker could possibly use this issue to intercept sensitive information. (CVE-2020-13943, CVE-2020-17527, CVE-2021-25122, CVE-2021-30640)

It was discovered that Tomcat did not properly deserialize untrusted data. An attacker could possibly use this issue to execute arbitrary code. (CVE-2020-9484, CVE-2021-33037)

It was discovered that Tomcat did not properly validate the input length. An attacker could possibly use this to trigger an infinite loop, resulting in a denial of service. (CVE-2021-25329, CVE-2021-41079)

It was discovered that Tomcat incorrectly handled certain uncommon PersistenceManager with FileStore configurations. A remote attacker could possibly use this issue to execute arbitrary code. This issue only affected tomcat8 for Ubuntu 18.04 LTS (CVE-2020-9484)

It was discovered that Tomcat incorrectly handled certain HTTP/2 connection requests. A remote attacker could use this issue to obtain wrong responses possibly containing sensitive information. This issue only affected tomcat8 for Ubuntu 18.04 LTS (CVE-2021-25122)

Thomas Wozenilek discovered that Tomcat incorrectly handled certain TLS packets. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected tomcat8 for Ubuntu 18.04 LTS (CVE-2021-41079)

Trung Pham discovered that a race condition existed in Tomcat when handling session files with FileStore. A remote attacker could possibly use this issue to execute arbitrary code. This issue affected tomcat8 for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS, and tomcat9 for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS (CVE-2022-23181)

It was discovered that Tomcat's documentation incorrectly stated that EncryptInterceptor provided availability protection when running over an untrusted network. A remote attacker could possibly use this issue to cause a denial of service even if EncryptInterceptor was being used. This issue affected tomcat8 for Ubuntu 18.04 LTS, and tomcat9 for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS (CVE-2022-29885)