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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 48.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-22 · updated 2026-06-17
• Weakness: CWE-193

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.

Affected products

• Apache Tomcat: from 8.5.85 through 8.5.87; from 9.0.71 through 9.0.73; from 10.1.5 through 10.1.7; 11.0.0-milestone2, 11.0.0-milestone3, 11.0.0-milestone4
• Debian Linux: 12.0
• NetApp 7-Mode Transition Tool: all versions

References

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