Apache Tomcat: HTTP/2 excess header handling DoS
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 11.0.0-M21, 10.1.25, 9.0.90
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
Improper Handling of Exceptional Conditions, Uncontrolled Resource Consumption vulnerability in Apache Tomcat. When processing an HTTP/2 stream, Tomcat did not handle some cases of excessive HTTP headers correctly. This led to a miscounting of active HTTP/2 streams which in turn led to the use of an incorrect infinite timeout which allowed connections to remain open which should have been closed. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M20, from 10.1.0-M1 through 10.1.24, from 9.0.0-M1 through 9.0.89. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other EOL versions may also be affected. Users are recommended to upgrade to version 11.0.0-M21, 10.1.25 or 9.0.90, which fixes the issue.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Apache Software Foundation Apache Tomcat
From 11.0.0-M1 · through 11.0.0-M20; From 10.1.0-M1 · through 10.1.24; From 9.0.0-M1 · through 9.0.89; From 8.5.0 · through 8.5.100
- org.apache.tomcat.embed:tomcat-embed-coreMaven
From 11.0.0-M1 · fixed in 11.0.0-M21
- org.apache.tomcat.embed:tomcat-embed-coreMaven
From 10.1.0-M1 · fixed in 10.1.25
- org.apache.tomcat.embed:tomcat-embed-coreMaven
From 9.0.0-M1 · fixed in 9.0.90
- org.apache.tomcat:tomcat-coyoteMaven
From 11.0.0-M1 · fixed in 11.0.0-M21
- org.apache.tomcat:tomcat-coyoteMaven
From 10.1.0-M1 · fixed in 10.1.25
- org.apache.tomcat:tomcat-coyoteMaven
From 9.0.0-M1 · fixed in 9.0.90
- org.apache.tomcat:tomcat-coyoteMaven
From 8.5.0 · through 8.5.100
- org.apache.tomcat.embed:tomcat-embed-coreMaven
From 8.5.0 · through 8.5.100