CVE-2021-44228 (GCVE-0-2021-44228)

Vulnerability from cvelistv5 – Published: 2021-12-10 00:00 – Updated: 2025-10-21 23:25
VLAI
Title
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
Summary
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-04 14:25 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-20 - Improper Input Validation
Assigner
References
URL Tags
https://logging.apache.org/log4j/2.x/security.html
http://www.openwall.com/lists/oss-security/2021/12/10/1 mailing-list
http://www.openwall.com/lists/oss-security/2021/12/10/2 mailing-list
https://tools.cisco.com/security/center/content/C… vendor-advisory
http://www.openwall.com/lists/oss-security/2021/12/10/3 mailing-list
https://security.netapp.com/advisory/ntap-2021121…
http://packetstormsecurity.com/files/165225/Apach…
https://psirt.global.sonicwall.com/vuln-detail/SN…
https://www.oracle.com/security-alerts/alert-cve-…
https://www.debian.org/security/2021/dsa-5020 vendor-advisory
https://lists.debian.org/debian-lts-announce/2021… mailing-list
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
https://msrc-blog.microsoft.com/2021/12/11/micros… vendor-advisory
http://www.openwall.com/lists/oss-security/2021/12/13/2 mailing-list
http://www.openwall.com/lists/oss-security/2021/12/13/1 mailing-list
http://www.openwall.com/lists/oss-security/2021/12/14/4 mailing-list
https://www.kb.cert.org/vuls/id/930724 third-party-advisory
https://twitter.com/kurtseifried/status/146934553…
https://cert-portal.siemens.com/productcert/pdf/s…
http://packetstormsecurity.com/files/165260/VMwar…
http://packetstormsecurity.com/files/165270/Apach…
http://packetstormsecurity.com/files/165261/Apach…
https://www.intel.com/content/www/us/en/security-…
http://www.openwall.com/lists/oss-security/2021/12/15/3 mailing-list
http://packetstormsecurity.com/files/165282/Log4j…
http://packetstormsecurity.com/files/165281/Log4j…
http://packetstormsecurity.com/files/165307/Log4j…
http://packetstormsecurity.com/files/165311/log4j…
http://packetstormsecurity.com/files/165306/L4sh-…
https://cert-portal.siemens.com/productcert/pdf/s…
https://lists.fedoraproject.org/archives/list/pac… vendor-advisory
http://packetstormsecurity.com/files/165371/VMwar…
https://cert-portal.siemens.com/productcert/pdf/s…
https://cert-portal.siemens.com/productcert/pdf/s…
https://www.oracle.com/security-alerts/cpujan2022.html
http://packetstormsecurity.com/files/165532/Log4S…
https://github.com/cisagov/log4j-affected-db/blob…
http://packetstormsecurity.com/files/165642/VMwar…
http://packetstormsecurity.com/files/165673/UniFi…
http://seclists.org/fulldisclosure/2022/Mar/23 mailing-list
https://www.bentley.com/en/common-vulnerability-e…
https://github.com/cisagov/log4j-affected-db
https://support.apple.com/kb/HT213189
https://www.oracle.com/security-alerts/cpuapr2022.html
https://github.com/nu11secur1ty/CVE-mitre/tree/ma…
https://www.nu11secur1ty.com/2021/12/cve-2021-442…
http://seclists.org/fulldisclosure/2022/Jul/11 mailing-list
http://packetstormsecurity.com/files/167794/Open-…
http://packetstormsecurity.com/files/167917/Mobil…
http://seclists.org/fulldisclosure/2022/Dec/2 mailing-list
http://packetstormsecurity.com/files/171626/AD-Ma…
https://www.cisa.gov/known-exploited-vulnerabilit… government-resource
Impacted products
Vendor Product Version
Apache Software Foundation Apache Log4j2 Affected: 2.0-beta9 , < log4j-core* (custom)
Create a notification for this product.
Credits
This issue was discovered by Chen Zhaojun of Alibaba Cloud Security Team.
Show details on NVD website
To clipboard 

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                "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-44228"
              }
            ],
            "timeline": [
              {
                "lang": "en",
                "time": "2021-12-10T00:00:00.000Z",
                "value": "CVE-2021-44228 added to CISA KEV"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "Apache Log4j2",
              "vendor": "Apache Software Foundation",
              "versions": [
                {
                  "changes": [
                    {
                      "at": "2.3.1",
                      "status": "unaffected"
                    },
                    {
                      "at": "2.4",
                      "status": "affected"
                    },
                    {
                      "at": "2.12.2",
                      "status": "unaffected"
                    },
                    {
                      "at": "2.13.0",
                      "status": "affected"
                    },
                    {
                      "at": "2.15.0",
                      "status": "unaffected"
                    }
                  ],
                  "lessThan": "log4j-core*",
                  "status": "affected",
                  "version": "2.0-beta9",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "value": "This issue was discovered by Chen Zhaojun of Alibaba Cloud Security Team."
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects."
            }
          ],
          "metrics": [
            {
              "other": {
                "content": {
                  "other": "critical"
                },
                "type": "unknown"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-502",
                  "description": "CWE-502 Deserialization of Untrusted Data",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-400",
                  "description": "CWE-400 Uncontrolled Resource Consumption",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-20",
                  "description": "CWE-20 Improper Input Validation",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2023-04-03T00:00:00.000Z",
            "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
            "shortName": "apache"
          },
          "references": [
            {
              "url": "https://logging.apache.org/log4j/2.x/security.html"
            },
            {
              "name": "[oss-security] 20211210 CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints",
              "tags": [
                "mailing-list"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/12/10/1"
            },
            {
              "name": "[oss-security] 20211210 Re: CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints",
              "tags": [
                "mailing-list"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/12/10/2"
            },
            {
              "name": "20211210 Vulnerability in Apache Log4j Library Affecting Cisco Products: December 2021",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd"
            },
            {
              "name": "[oss-security] 20211210 Re: CVE-2021-44228: Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints",
              "tags": [
                "mailing-list"
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              "url": "http://www.openwall.com/lists/oss-security/2021/12/10/3"
            },
            {
              "url": "https://security.netapp.com/advisory/ntap-20211210-0007/"
            },
            {
              "url": "http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html"
            },
            {
              "url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032"
            },
            {
              "url": "https://www.oracle.com/security-alerts/alert-cve-2021-44228.html"
            },
            {
              "name": "DSA-5020",
              "tags": [
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              ],
              "url": "https://www.debian.org/security/2021/dsa-5020"
            },
            {
              "name": "[debian-lts-announce] 20211212 [SECURITY] [DLA 2842-1] apache-log4j2 security update",
              "tags": [
                "mailing-list"
              ],
              "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00007.html"
            },
            {
              "name": "FEDORA-2021-f0f501d01f",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/"
            },
            {
              "name": "Microsoft\u2019s Response to CVE-2021-44228 Apache Log4j 2",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/"
            },
            {
              "name": "[oss-security] 20211213 Re: CVE-2021-4104: Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2",
              "tags": [
                "mailing-list"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/12/13/2"
            },
            {
              "name": "[oss-security] 20211213 CVE-2021-4104: Deserialization of untrusted data in JMSAppender in Apache Log4j 1.2",
              "tags": [
                "mailing-list"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/12/13/1"
            },
            {
              "name": "[oss-security] 20211214 CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack",
              "tags": [
                "mailing-list"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/12/14/4"
            },
            {
              "name": "20211210 A Vulnerability in Apache Log4j Library Affecting Cisco Products: December 2021",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd"
            },
            {
              "name": "VU#930724",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.kb.cert.org/vuls/id/930724"
            },
            {
              "url": "https://twitter.com/kurtseifried/status/1469345530182455296"
            },
            {
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf"
            },
            {
              "url": "http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.html"
            },
            {
              "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html"
            },
            {
              "name": "20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd"
            },
            {
              "name": "[oss-security] 20211215 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack",
              "tags": [
                "mailing-list"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2021/12/15/3"
            },
            {
              "url": "http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.html"
            },
            {
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf"
            },
            {
              "name": "FEDORA-2021-66d6c484f3",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M5CSVUNV4HWZZXGOKNSK6L7RPM7BOKIB/"
            },
            {
              "url": "http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html"
            },
            {
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf"
            },
            {
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf"
            },
            {
              "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.html"
            },
            {
              "url": "https://github.com/cisagov/log4j-affected-db/blob/develop/SOFTWARE-LIST.md"
            },
            {
              "url": "http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.html"
            },
            {
              "name": "20220314 APPLE-SA-2022-03-14-7 Xcode 13.3",
              "tags": [
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              ],
              "url": "http://seclists.org/fulldisclosure/2022/Mar/23"
            },
            {
              "url": "https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001"
            },
            {
              "url": "https://github.com/cisagov/log4j-affected-db"
            },
            {
              "url": "https://support.apple.com/kb/HT213189"
            },
            {
              "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
            },
            {
              "url": "https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-44228"
            },
            {
              "url": "https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html"
            },
            {
              "name": "20220721 Open-Xchange Security Advisory 2022-07-21",
              "tags": [
                "mailing-list"
              ],
              "url": "http://seclists.org/fulldisclosure/2022/Jul/11"
            },
            {
              "url": "http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.html"
            },
            {
              "name": "20221208 Intel Data Center Manager \u003c= 5.1 Local Privileges Escalation",
              "tags": [
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              "url": "http://seclists.org/fulldisclosure/2022/Dec/2"
            },
            {
              "url": "http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.html"
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          "source": {
            "discovery": "UNKNOWN"
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          "title": "Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints",
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        "assignerShortName": "apache",
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        "datePublished": "2021-12-10T00:00:00.000Z",
        "dateReserved": "2021-11-26T00:00:00.000Z",
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  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.