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).

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:9583 advisory.

    Red Hat JBoss Enterprise Application Platform 7 is a platform for Java applications based on the WildFly     application runtime. This release of Red Hat JBoss Enterprise Application Platform 7.3.14 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.3.13, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.3.14 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow: unrestricted request storage leads to memory exhaustion [eap-7.3.z] (CVE-2023-1973)

    * undertow: Infinite loop in SslConduit during close [eap-7.3.z] (CVE-2023-1108)

    * undertow: OutOfMemoryError due to @MultipartConfig handling [eap-7.3.z] (CVE-2023-3223)

    * undertow: Out-of-memory Error after several closed connections with wildfly-http-client protocol     [eap-7.3.z] (CVE-2024-1635)

    * keycloak: org.keycloak.protocol.oidc: unvalidated cross-origin messages in checkLoginIframe leads to     DDoS [eap-7.3.z] (CVE-2024-1249)

    * undertow: Server identity in https connection is not checked by the undertow client [eap-7.3.z]     (CVE-2022-4492)

    * undertow: potential security issue in flow control over HTTP/2 may lead to DOS(incomplete fix for     CVE-2021-3629) [eap-7.3.z] (CVE-2022-1259)

    * undertow: Large AJP request may cause DoS [eap-7.3.z] (CVE-2022-2053)

    * undertow: AJP Request closes connection exceeding maxRequestSize [eap-7.3.z] (CVE-2023-5379)

    * undertow: Double AJP response for 400 from EAP 7 results in CPING failures [eap-7.3.z] (CVE-2022-1319)

    * eap: JBoss EAP: wildfly-elytron has a SSRF security issue [eap-7.3.z] (CVE-2024-1233)

    * wildfly-elytron: possible timing attacks via use of unsafe comparator [eap-7.3.z] (CVE-2022-3143)

    * netty-all: netty-codec: SnappyFrameDecoder doesn't restrict chunk length and may buffer skippable chunks     in an unnecessary way [eap-7.3.z] (CVE-2021-37137)

    * netty-all: netty-codec: Bzip2Decoder doesn't allow setting size restrictions for decompressed data     [eap-7.3.z] (CVE-2021-37136)

    * jackson-databind: denial of service via a large depth of nested objects [eap-7.3.z] (CVE-2020-36518)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgements, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:9582 advisory.

    Red Hat JBoss Enterprise Application Platform 7 is a platform for Java applications based on the WildFly     application runtime. This release of Red Hat JBoss Enterprise Application Platform 7.1.11 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.1.10, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.1.11 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow: special character in query results in server errors [eap-7.1.z] (CVE-2020-27782)

    * wildfly: unsafe deserialization in Wildfly Enterprise Java Beans [eap-7.1.z] (CVE-2020-10740)

    * libthrift: potential DoS when processing untrusted payloads [eap-7.1.z] (CVE-2020-13949)

    * netty-all: netty-codec: SnappyFrameDecoder doesn't restrict chunk length and may buffer skippable chunks     in an unnecessary way [eap-7.1.z] (CVE-2021-37137)

    * hibernate-core: SQL injection vulnerability when both hibernate.use_sql_comments and JPQL String     literals are used [eap-7.1.z] (CVE-2020-25638)

    * wildfly-openssl: memory leak per HTTP session creation in WildFly OpenSSL - WFSSL-51 - Memory leak with     mutual authentication and OpenSSL (CVE-2020-25644)

    * netty-all: netty-codec: Bzip2Decoder doesn't allow setting size restrictions for decompressed data     [eap-7.1.z] (CVE-2021-37136)

    * jackson-databind: denial of service via a large depth of nested objects [eap-7.1.z] (CVE-2020-36518)

    * eap: JBoss EAP: wildfly-elytron has a SSRF security issue [eap-7.1.z] (CVE-2024-1233)

    * keycloak: org.keycloak.protocol.oidc: unvalidated cross-origin messages in checkLoginIframe leads to     DDoS [eap-7.1.z] (CVE-2024-1249)

    * undertow: Server identity in https connection is not checked by the undertow client [eap-7.1.z]     (CVE-2022-4492)

    * undertow: AJP Request closes connection exceeding maxRequestSize [eap-7.1.z] (CVE-2023-5379)

    * undertow: potential security issue in flow control over HTTP/2 may lead to DOS(incomplete fix for     CVE-2021-3629) [eap-7.1.z] (CVE-2022-1259)

    * wildfly-elytron: possible timing attacks via use of unsafe comparator [eap-7.1.z] (CVE-2022-3143)

    * jakarta-el: ELParserTokenManager enables invalid EL expressions to be evaluate [eap-7.1.z]     (CVE-2021-28170)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
240509	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.3.14 Security update (Important) (RHSA-2025:9583)	Nessus	Red Hat Local Security Checks	high
240506	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.1.11 on RHEL 7 (RHSA-2025:9582)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2023-5379

high

Tenable Plugins

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high