CVE intelligence and bounded remediation

CVE-2021-44832 — Apache Log4J security vulnerability

High CVSS 8.5

Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

Severity
High
CVSS
8.5 (2.0)
Published
2021-12-28
CISA KEV
Not currently listed
Ecosystem
java/maven
Weaknesses
CWE-20, CWE-74

Affected products

  • apache / log4j
  • apache / log4j / 2.0
  • oracle / communications_diameter_signaling_router
  • oracle / communications_interactive_session_recorder / 6.3
  • oracle / communications_interactive_session_recorder / 6.4

Showing 5 representative product identities from 71 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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