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    CVE-2021-44832

    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.

    Published:Dec 28, 2021
    Last Modified:May 29, 2026
    EPS:Dec 28, 2021
    EPSS Score:0.53648
    CVSS Score:6.6

    Affected Products

    Vendor
    Apache
    Product
    Log4j
    Vendor
    Cisco
    Product
    Cloudcenter
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Oracle
    Product
    Communications Brm - Elastic Charging Engine
    Vendor
    Oracle
    Product
    Communications Diameter Signaling Router
    Vendor
    Oracle
    Product
    Communications Interactive Session Recorder
    Vendor
    Oracle
    Product
    Communications Offline Mediation Controller
    Vendor
    Oracle
    Product
    Flexcube Private Banking
    Vendor
    Oracle
    Product
    Health Sciences Data Management Workbench
    Vendor
    Oracle
    Product
    Policy Automation
    Vendor
    Oracle
    Product
    Policy Automation For Mobile Devices
    Vendor
    Oracle
    Product
    Primavera Gateway
    Vendor
    Oracle
    Product
    Primavera P6 Enterprise Project Portfolio Management
    Vendor
    Oracle
    Product
    Primavera Unifier
    Vendor
    Oracle
    Product
    Product Lifecycle Analytics
    Vendor
    Oracle
    Product
    Retail Assortment Planning
    Vendor
    Oracle
    Product
    Retail Fiscal Management
    Vendor
    Oracle
    Product
    Retail Order Broker
    Vendor
    Oracle
    Product
    Retail Xstore Point Of Service
    Vendor
    Oracle
    Product
    Siebel Ui Framework
    Vendor
    Oracle
    Product
    Weblogic Server
    Vendor
    Redhat
    Product
    Amq Streams
    Vendor
    Redhat
    Product
    Camel Quarkus
    Vendor
    Redhat
    Product
    Integration
    Vendor
    Redhat
    Product
    Jboss Data Grid
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Jboss Fuse
    Vendor
    Redhat
    Product
    Logging
    Vendor
    Redhat
    Product
    Openshift
    Vendor
    Redhat
    Product
    Openshift Application Runtimes

    Exploits

    https://github.com/cckuailong/log4j_RCE_CVE-2021-44832https://github.com/name/log4j-scanner

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-105 HTTP Request Splitting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-273 HTTP Response Smuggling
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-34 HTTP Response Splitting
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-51 Poison Web Service Registry
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-6 Argument Injection
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-84 XQuery Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-34481 (CVSS 6.3) — Apache Log4j's JsonTemplateLayout https://logging.apache.org/log4j/2.x/manual/json-template-layout.html , in …
    CVE-2026-34480 (CVSS 6.9) — Apache Log4j Core's XmlLayout https://logging.apache.org/log4j/2.x/manual/layouts.html#XmlLayout , in version…
    CVE-2026-34479 (CVSS 6.9) — The Log4j1XmlLayout from the Apache Log4j 1-to-Log4j 2 bridge fails to escape characters forbidden by the XML …
    CVE-2026-34478 (CVSS 6.9) — Apache Log4j Core's Rfc5424Layout https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout , in…
    CVE-2026-34477 (CVSS 6.3) — The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete: it addres…
    CVE-2025-68161 (CVSS 6.3) — The Socket Appender in Apache Log4j Core versions 2.0-beta9 through 2.25.2 does not perform TLS hostname verif…
    CVE-2023-26464 (CVSS 7.5) — ** UNSUPPORTED WHEN ASSIGNED ** When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE le…
    CVE-2022-23305 (CVSS 9.8) — By design, the JDBCAppender in Log4j 1.2.x accepts an SQL statement as a configuration parameter where the val…
    CVE-2022-23302 (CVSS 8.8) — JMSSink in all versions of Log4j 1.x is vulnerable to deserialization of untrusted data when the attacker has …
    CVE-2022-23307 (CVSS 8.8) — CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 C…

    References

    http://www.openwall.com/lists/oss-security/2021/12/28/1
    https://cert-portal.siemens.com/productcert/pdf/ssa-784507.pdf
    https://issues.apache.org/jira/browse/LOG4J2-3293
    https://lists.apache.org/thread/s1o5vlo78ypqxnzn6p8zf6t9shtq5143
    https://lists.debian.org/debian-lts-announce/2021/12/msg00036.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EVV25FXL4FU5X6X5BSL7RLQ7T6F65MRA/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57MPJUW3MA6QGWZRTMCHHMMPQNVKGFC/
    https://security.netapp.com/advisory/ntap-20220104-0001/
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
    https://www.oracle.com/security-alerts/cpuapr2022.html
    https://www.oracle.com/security-alerts/cpujan2022.html
    https://www.oracle.com/security-alerts/cpujul2022.html
    http://www.openwall.com/lists/oss-security/2021/12/28/1
    https://cert-portal.siemens.com/productcert/pdf/ssa-784507.pdf
    https://issues.apache.org/jira/browse/LOG4J2-3293
    https://lists.apache.org/thread/s1o5vlo78ypqxnzn6p8zf6t9shtq5143
    https://lists.debian.org/debian-lts-announce/2021/12/msg00036.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EVV25FXL4FU5X6X5BSL7RLQ7T6F65MRA/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57MPJUW3MA6QGWZRTMCHHMMPQNVKGFC/
    https://security.netapp.com/advisory/ntap-20220104-0001/
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
    https://www.oracle.com/security-alerts/cpuapr2022.html
    https://www.oracle.com/security-alerts/cpujan2022.html
    https://www.oracle.com/security-alerts/cpujul2022.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High