Undertow OOM via MultipartConfig Bypass for Remote DoS
CVE-2023-3223 Published on September 27, 2023

Undertow: outofmemoryerror due to @multipartconfig handling
A flaw was found in undertow. Servlets annotated with @MultipartConfig may cause an OutOfMemoryError due to large multipart content. This may allow unauthorized users to cause remote Denial of Service (DoS) attack. If the server uses fileSizeThreshold to limit the file size, it's possible to bypass the limit by setting the file name in the request to null.

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Vulnerability Analysis

CVE-2023-3223 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Timeline

Reported to Red Hat.

Made public. 75 days later.

Weakness Type

What is a Stack Exhaustion Vulnerability?

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

CVE-2023-3223 has been classified to as a Stack Exhaustion vulnerability or weakness.


Products Associated with CVE-2023-3223

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Red Hat Undertow
 
Red Hat Single Sign On
 
Red Hat Jboss Enterprise Application Platform Text Only Advisories
 

Affected Versions

Red Hat Fuse 7.12.1: Red Hat JBoss Enterprise Application Platform 7.1.0: Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8: Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9: Red Hat JBoss Enterprise Application Platform 7.4 on RHEL 7: Red Hat Single Sign-On 7.6.5: Red Hat Single Sign-On 7.6 for RHEL 7: Red Hat Single Sign-On 7.6 for RHEL 8: Red Hat Single Sign-On 7.6 for RHEL 9: Red Hat RHEL-8 based Middleware Containers: Red Hat build of Quarkus: Red Hat Data Grid 8: Red Hat Decision Manager 7: Red Hat Integration Camel K: Red Hat Integration Service Registry: Red Hat JBoss Data Grid 7: Red Hat JBoss Enterprise Application Platform Expansion Pack: Red Hat JBoss Fuse 6: Red Hat OpenStack Platform 13 (Queens) Operational Tools: Red Hat Process Automation 7: Red Hat support for Spring Boot:

Exploit Probability

EPSS
0.88%
Percentile
75.06%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.