Undertow in Red Hat wildfly before version 11.0.0.Beta1 is vulnerable to a resource exhaustion resulting in a denial of service.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• redhat jboss wildfly application serverup to 10.1.0 inclusive
• redhat jboss wildfly application server11.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

• Red Hat, Inc. wildfly

  • 11.0.0.Beta1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2016-0793Incomplete blacklist vulnerability in the servlet filter restriction mechanism in WildFly (formerly JBoss Application Server) before 10.0.0.
  35Monitor
• CVE-2015-3198The Undertow module of WildFly 9.x before 9.0.0.CR2 and 10.x before 10.0.0.Alpha1 allows remote attackers to obtain the source code of a JSP
  31Monitor
• CVE-2018-1047A flaw was found in Wildfly 9.x.
  22Monitor
• CVE-2015-5178The Management Console in Red Hat Enterprise Application Platform before 6.4.4 and WildFly (formerly JBoss Application Server) does not send
  18Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.