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CVE-2023-5379— Undertow: ajp request closes connection exceeding maxrequestsize

Quick assessment

Affected
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat Undertow是美国红帽（Red Hat）公司的一款基于Java的嵌入式Web服务器，是Wildfly（Java应用服务器）默认的Web服务器。 Red Hat Undertow 存在安全漏洞，该漏洞源于当发送 AJP 请求后未收到 AJP 响应，从后端关闭 TCP 连接时，mod_proxy_cluster 会将 JBoss EAP 实例标记为错误工作器并停止转发，攻击者利用该漏洞可以重复发送超过最大标头大小的请求，从而导致拒绝服务。

CVSS 7.5 · High EPSS 1.03% · P62

Affected Version Matrix 33

VendorProduct Version RangeStatus
Red Hat Red Hat build of Quarkus any unaffected
Red Hat Red Hat Data Grid 8 any unaffected
Red Hat Red Hat Decision Manager 7 any unknown
Red Hat Red Hat Fuse 7 any unknown
Red Hat Red Hat JBoss Data Grid 7 any unknown
Red Hat Red Hat JBoss Enterprise Application Platform 7 any affected
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:3.0.1-4.b08_redhat_00005.1.ep7.el7< * unaffected
0:5.1.17-3.Final_redhat_00004.1.ep7.el7< * unaffected
0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7< * unaffected
0:4.0.12-1.Final_redhat_00002.1.ep7.el7< * unaffected
0:4.1.63-2.Final_redhat_00003.1.ep7.el7< * unaffected
0:1.4.18-16.SP14_redhat_00001.1.ep7.el7< * unaffected
0:7.1.11-4.GA_redhat_00002.1.ep7.el7< * unaffected
0:1.1.14-1.Final_redhat_00001.1.ep7.el7< * unaffected
… +4 more rows
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-3.redhat_00006.1.el7eap< * unaffected
0:2.10.4-3.redhat_00006.1.el7eap< * unaffected
0:2.10.4-5.redhat_00006.1.el7eap< * unaffected
0:2.10.4-3.redhat_00006.1.el7eap< * unaffected
0:2.10.4-5.redhat_00006.1.el7eap< * unaffected
0:2.10.4-2.redhat_00006.1.el7eap< * unaffected
0:1.7.2-16.Final_redhat_00017.1.el7eap< * unaffected
0:4.1.63-5.Final_redhat_00003.1.el7eap< * unaffected
… +3 more rows
Red Hat Red Hat JBoss Fuse 6 any unknown
Red Hat Red Hat Process Automation 7 any unknown
Red Hat Red Hat Single Sign-On 7 any affected
Red Hat Red Hat support for Spring Boot any unaffected
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I. Basic Information for CVE-2023-5379

Vulnerability Information
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Vulnerability Title
Undertow: ajp request closes connection exceeding maxrequestsize
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Undertow 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Undertow是美国红帽（Red Hat）公司的一款基于Java的嵌入式Web服务器，是Wildfly（Java应用服务器）默认的Web服务器。 Red Hat Undertow 存在安全漏洞，该漏洞源于当发送 AJP 请求后未收到 AJP 响应，从后端关闭 TCP 连接时，mod_proxy_cluster 会将 JBoss EAP 实例标记为错误工作器并停止转发，攻击者利用该漏洞可以重复发送超过最大标头大小的请求，从而导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:3.0.1-4.b08_redhat_00005.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:5.1.17-3.Final_redhat_00004.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:4.0.12-1.Final_redhat_00002.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:4.1.63-2.Final_redhat_00003.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.4.18-16.SP14_redhat_00001.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:7.1.11-4.GA_redhat_00002.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.1.14-1.Final_redhat_00001.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.0.21-1.Final_redhat_00001.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.0.13-1.Final_redhat_00001.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.0.12-1.Final_redhat_00001.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7 0:1.0.12-6.Final_redhat_00001.1.ep7.el7 ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.1::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-3.redhat_00006.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-3.redhat_00006.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-5.redhat_00006.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-3.redhat_00006.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-5.redhat_00006.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.10.4-2.redhat_00006.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:1.7.2-16.Final_redhat_00017.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:4.1.63-5.Final_redhat_00003.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:2.0.41-4.SP5_redhat_00001.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:7.3.14-3.GA_redhat_00002.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 0:1.10.17-1.Final_redhat_00001.1.el7eap ~ * cpe:/a:redhat:jboss_enterprise_application_platform_eus:7.3::el7
Red Hat Red Hat build of Quarkus - cpe:/a:redhat:quarkus:2
Red Hat Red Hat Data Grid 8 - cpe:/a:redhat:jboss_data_grid:8
Red Hat Red Hat Decision Manager 7 - cpe:/a:redhat:jboss_enterprise_brms_platform:7
Red Hat Red Hat Fuse 7 - cpe:/a:redhat:jboss_fuse:7
Red Hat Red Hat JBoss Data Grid 7 - cpe:/a:redhat:jboss_data_grid:7
Red Hat Red Hat JBoss Enterprise Application Platform 7 - cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat Red Hat JBoss Fuse 6 - cpe:/a:redhat:jboss_fuse:6

II. Public POCs for CVE-2023-5379

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III. Intelligence Information for CVE-2023-5379

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Vendor Advisories for CVE-2023-5379 (5)

Same Patch Batch · Red Hat · 2023-12-12 · 4 CVEs total

CVE-2023-5764 7.1 HIGH Ansible: template injection
CVE-2023-4958 6.1 MEDIUM Stackrox: missing http security headers allows for clickjacking in web ui
CVE-2023-6710 5.4 MEDIUM Mod_cluster/mod_proxy_cluster: stored cross site scripting

IV. Related Vulnerabilities

Same product: Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7
Same vendor: Red Hat
Same weakness: CWE-770

V. Comments for CVE-2023-5379

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