Undertow: ajp request closes connection exceeding maxrequestsize
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- 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
A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens because mod_proxy_cluster marks the JBoss EAP instance as an error worker when the TCP connection is closed from the backend after sending the AJP request without receiving an AJP response, and stops forwarding. This issue could allow a malicious user could to repeatedly send requests that exceed the max-header-size, causing a Denial of Service (DoS).
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- eap7-glassfish-el
Version range not reported
- eap7-hibernate
Version range not reported
- eap7-jackson-databind
Version range not reported
- eap7-jboss-ejb-client
Version range not reported
- eap7-netty
Version range not reported
- eap7-undertow
Version range not reported
- eap7-wildfly
Version range not reported
- eap7-wildfly-elytron
Version range not reported
- eap7-wildfly-http-client
Version range not reported
- eap7-wildfly-naming-client
Version range not reported
- eap7-wildfly-openssl
Version range not reported
- eap7-wildfly-openssl-linux
Version range not reported
- eap7-jackson-annotations
Version range not reported
- eap7-jackson-core
Version range not reported
- eap7-jackson-databind
Version range not reported
- eap7-jackson-jaxrs-providers
Version range not reported
- eap7-jackson-modules-base
Version range not reported
- eap7-jackson-modules-java8
Version range not reported
- eap7-jboss-server-migration
Version range not reported
- eap7-netty
Version range not reported
- eap7-undertow
Version range not reported
- eap7-wildfly
Version range not reported
- eap7-wildfly-elytron
Version range not reported
- quarkus-undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported
- undertow
Version range not reported