When a POST request comes through AJP and the request exceeds the max-post-size limit (maxEntitySize), Undertow's AjpServerRequestConduit implementation closes a connection without sending any response to the client/proxy. This behavior results in that a front-end proxy marking the backend worker (application server) as an error state and not forward requests to the worker for a while. In mod_cluster, this continues until the next STATUS request (10 seconds intervals) from the application server updates the server state. So, in the worst case, it can result in "All workers are in error state" and mod_cluster responds "503 Service Unavailable" for a while (up to 10 seconds). In mod_proxy_balancer, it does not forward requests to the worker until the "retry" timeout passes. However, luckily, mod_proxy_balancer has "forcerecovery" setting (On by default; this parameter can force the immediate recovery of all workers without considering the retry parameter of the workers if all workers of a balancer are in error state.). So, unlike mod_cluster, mod_proxy_balancer does not result in responding "503 Service Unavailable". An attacker could use this behavior to send a malicious request and trigger server errors, resulting in DoS (denial of service). This flaw was fixed in Undertow 2.2.19.Final, Undertow 2.3.0.Alpha2.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:4226 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 7.1.10 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.1.9, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.1.9 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:6823 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 7.4.7 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.4.6, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.7 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow: Large AJP request may cause DoS (CVE-2022-2053)

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

    * snakeyaml: Denial of Service due missing to nested depth limitation for collections. (CVE-2022-25857)

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 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:6822 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 7.4.7 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.4.6, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.7 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow: Large AJP request may cause DoS (CVE-2022-2053)

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

    * snakeyaml: Denial of Service due missing to nested depth limitation for collections. (CVE-2022-25857)

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-2022:6821 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 7.4.7 serves as a     replacement for Red Hat JBoss Enterprise Application Platform 7.4.6, and includes bug fixes and     enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.7 Release Notes for information     about the most significant bug fixes and enhancements included in this release.

    Security Fix(es):

    * undertow: Large AJP request may cause DoS (CVE-2022-2053)

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

    * snakeyaml: Denial of Service due missing to nested depth limitation for collections. (CVE-2022-25857)

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
237013	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.1.10 on RHEL 7 (RHSA-2025:4226)	Nessus	Red Hat Local Security Checks	high
165981	RHEL 9 : Red Hat JBoss Enterprise Application Platform 7.4.7 Security update (Important) (RHSA-2022:6823)	Nessus	Red Hat Local Security Checks	high
165980	RHEL 8 : Red Hat JBoss Enterprise Application Platform 7.4.7 Security update (Important) (RHSA-2022:6822)	Nessus	Red Hat Local Security Checks	high
165959	RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.4.7 Security update (Important) (RHSA-2022:6821)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2022-2053

high

Tenable Plugins

high

high

high

high