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    CVE-2021-4104

    JMSAppender in Log4j 1.2 is vulnerable to deserialization of untrusted data when the attacker has write access to the Log4j configuration. The attacker can provide TopicBindingName and TopicConnectionFactoryBindingName configurations causing JMSAppender to perform JNDI requests that result in remote code execution in a similar fashion to CVE-2021-44228. Note this issue only affects Log4j 1.2 when specifically configured to use JMSAppender, which is not the default. Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2 as it addresses numerous other issues from the previous versions.

    Published:Dec 10, 2021
    Last Modified:May 28, 2026
    EPS:Dec 14, 2021
    EPSS Score:0.72202
    CVSS Score:7.5

    Affected Products

    Vendor
    Apache
    Product
    Log4j
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Oracle
    Product
    Advanced Supply Chain Planning
    Vendor
    Oracle
    Product
    Business Intelligence
    Vendor
    Oracle
    Product
    Business Process Management Suite
    Vendor
    Oracle
    Product
    Communications Eagle Ftp Table Base Retrieval
    Vendor
    Oracle
    Product
    Communications Messaging Server
    Vendor
    Oracle
    Product
    Communications Network Integrity
    Vendor
    Oracle
    Product
    Communications Offline Mediation Controller
    Vendor
    Oracle
    Product
    Communications Unified Inventory Management
    Vendor
    Oracle
    Product
    E-business Suite Cloud Manager And Cloud Backup Module
    Vendor
    Oracle
    Product
    Enterprise Manager Base Platform
    Vendor
    Oracle
    Product
    Financial Services Revenue Management And Billing Analytics
    Vendor
    Oracle
    Product
    Fusion Middleware Common Libraries And Tools
    Vendor
    Oracle
    Product
    Goldengate
    Vendor
    Oracle
    Product
    Healthcare Data Repository
    Vendor
    Oracle
    Product
    Hyperion Data Relationship Management
    Vendor
    Oracle
    Product
    Hyperion Infrastructure Technology
    Vendor
    Oracle
    Product
    Identity Management Suite
    Vendor
    Oracle
    Product
    Jdeveloper
    Vendor
    Oracle
    Product
    Mysql Enterprise Monitor
    Vendor
    Oracle
    Product
    Retail Allocation
    Vendor
    Oracle
    Product
    Retail Extract Transform And Load
    Vendor
    Oracle
    Product
    Stream Analytics
    Vendor
    Oracle
    Product
    Timesten Grid
    Vendor
    Oracle
    Product
    Tuxedo
    Vendor
    Oracle
    Product
    Utilities Testing Accelerator
    Vendor
    Oracle
    Product
    Weblogic Server
    Vendor
    Redhat
    Product
    Codeready Studio
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Integration Camel K
    Vendor
    Redhat
    Product
    Integration Camel Quarkus
    Vendor
    Redhat
    Product
    Jboss A-mq
    Vendor
    Redhat
    Product
    Jboss A-mq Streaming
    Vendor
    Redhat
    Product
    Jboss Amq
    Vendor
    Redhat
    Product
    Jboss Data Grid
    Vendor
    Redhat
    Product
    Jboss Data Virtualization
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform
    Vendor
    Redhat
    Product
    Jboss Enterprise Application Platform Eus
    Vendor
    Redhat
    Product
    Jboss Enterprise Web Server
    Vendor
    Redhat
    Product
    Jboss Fuse
    Vendor
    Redhat
    Product
    Jboss Fuse Service Works
    Vendor
    Redhat
    Product
    Jboss Operations Network
    Vendor
    Redhat
    Product
    Jboss Web Server
    Vendor
    Redhat
    Product
    Openshift
    Vendor
    Redhat
    Product
    Openshift Application Runtimes
    Vendor
    Redhat
    Product
    Openshift Container Platform
    Vendor
    Redhat
    Product
    Process Automation
    Vendor
    Redhat
    Product
    Red Hat Single Sign On
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Els
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Software Collections
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Redhat
    Product
    Rhev Manager
    Vendor
    Redhat
    Product
    Rhosemc
    Vendor
    Redhat
    Product
    Single Sign-on
    Vendor
    Redhat
    Product
    Software Collections

    Exploits

    https://github.com/cckuailong/log4shell_1.xhttps://github.com/cuijiung/log4j-CVE-2021-4104https://github.com/open-AIMS/log4j

    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-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-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    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-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-586 Object Injection
    CAPEC-588 DOM-Based XSS
    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-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-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/2022/01/18/3
    https://access.redhat.com/security/cve/CVE-2021-4104
    https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126
    https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0033
    https://security.gentoo.org/glsa/202209-02
    https://security.gentoo.org/glsa/202310-16
    https://security.gentoo.org/glsa/202312-02
    https://security.gentoo.org/glsa/202312-04
    https://security.netapp.com/advisory/ntap-20211223-0007/
    https://www.cve.org/CVERecord?id=CVE-2021-44228
    https://www.kb.cert.org/vuls/id/930724
    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/2022/01/18/3
    https://access.redhat.com/security/cve/CVE-2021-4104
    https://github.com/apache/logging-log4j2/pull/608#issuecomment-990494126
    https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0033
    https://security.gentoo.org/glsa/202209-02
    https://security.gentoo.org/glsa/202310-16
    https://security.gentoo.org/glsa/202312-02
    https://security.gentoo.org/glsa/202312-04
    https://security.netapp.com/advisory/ntap-20211223-0007/
    https://www.cve.org/CVERecord?id=CVE-2021-44228
    https://www.kb.cert.org/vuls/id/930724
    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