Описание
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
A flaw was found in Netty's XmlFrameDecoder component. An unauthenticated remote attacker could send specially crafted XML closing-tag sequences. This could cause the system to repeatedly rescan accumulated data, leading to high CPU utilization and a denial of service (DoS).
Отчет
A flaw was found in Netty's XmlFrameDecoder component within the netty-codec-xml library. Red Hat products including JBoss EAP 7, Red Hat Fuse 7, Red Hat Single Sign-On 7, and Red Hat Integration Camel Spring Boot ship the netty-codec-xml library. However, these products do not utilize the XmlFrameDecoder class for XML processing. The vulnerable code path, which handles reassembly of fragmented XML messages across network frames, is not instantiated or exercised in Red Hat product deployments. This vulnerability only affects custom applications that explicitly use XmlFrameDecoder to parse untrusted XML input from network streams.
Меры по смягчению последствий
Red Hat products do not use the vulnerable XmlFrameDecoder component. No mitigation is required for standard product deployments. Custom applications built on Red Hat middleware that explicitly instantiate XmlFrameDecoder should avoid processing untrusted XML input or upgrade to netty-codec-xml 4.1.136.Final or later.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat JBoss Enterprise Application Platform 7 | jboss-eap-7/eap74-els-openjdk11-openshift-rhel8 | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 7 | jboss-eap-7/eap74-els-openjdk17-openshift-rhel8 | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 7 | jboss-eap-7/eap74-els-openjdk8-openshift-rhel8 | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 7 | netty-codec-xml | Not affected | ||
| Red Hat Single Sign-On 7 | netty-codec-xml | Will not fix | ||
| Red Hat build of Apache Camel 4.18.4 for Spring Boot 3.5.16 | netty-codec-xml | Fixed | RHSA-2026:71675 | 24.09.2026 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Netty is an asynchronous, event-driven network application framework. ...
EPSS
7.5 High
CVSS3