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URL: https://nvd.nist.gov/vuln/detail/CVE-2021-45105

⇱ NVD - CVE-2021-45105

  1. Vulnerabilities

CVE-2021-45105 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
http://www.openwall.com/lists/oss-security/2021/12/19/1 Apache Software Foundation, CVE Mailing List  Mitigation  Third Party Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf Apache Software Foundation, CVE Third Party Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf Apache Software Foundation, CVE Third Party Advisory 
https://logging.apache.org/log4j/2.x/security.html Apache Software Foundation, CVE Release Notes  Vendor Advisory 
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 Apache Software Foundation, CVE Third Party Advisory 
https://security.netapp.com/advisory/ntap-20211218-0001/ Apache Software Foundation, CVE Third Party Advisory 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd Apache Software Foundation, CVE Third Party Advisory 
https://www.debian.org/security/2021/dsa-5024 Apache Software Foundation, CVE Third Party Advisory 
https://www.kb.cert.org/vuls/id/930724 Apache Software Foundation, CVE Third Party Advisory  US Government Resource 
https://www.oracle.com/security-alerts/cpuapr2022.html Apache Software Foundation, CVE Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpujan2022.html Apache Software Foundation, CVE Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpujul2022.html Apache Software Foundation, CVE Third Party Advisory 
https://www.zerodayinitiative.com/advisories/ZDI-21-1541/ Apache Software Foundation, CVE Third Party Advisory  VDB Entry 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation 👁 cwe source acceptance level
NIST   Apache Software Foundation  
CWE-674 Uncontrolled Recursion 👁 cwe source acceptance level
NIST   Apache Software Foundation  

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

23 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 12:13:11 AM

Action Type Old Value New Value
Added SSVC 
{"timestamp":"2026-05-29T11:45:21.048570Z","id":"CVE-2021-45105","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

CVE Modified by Apache Software Foundation 6/17/2026 12:13:11 AM

Action Type Old Value New Value
Added Affected 
[{"vendor":"Apache Software Foundation","product":"Apache Log4j2","versions":[{"version":"log4j-core","lessThan":"2.17.0","versionType":"custom","status":"affected","changes":[{"at":"2.13.0","status":"affected"},{"at":"2.12.3","status":"unaffected"},{"at":"2.4","status":"affected"},{"at":"2.3.1","status":"unaffected"},{"at":"2.0-alpha1","status":"affected"}]}]}]

CVE Modified by CISA-ADP 5/29/2026 9:16:19 AM

Action Type Old Value New Value
Added CVSS V3.1 
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE Modified by CVE 11/21/2024 1:31:58 AM

Action Type Old Value New Value
Added Reference 
http://www.openwall.com/lists/oss-security/2021/12/19/1
Added Reference 
https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf
Added Reference 
https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf
Added Reference 
https://logging.apache.org/log4j/2.x/security.html
Added Reference 
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032
Added Reference 
https://security.netapp.com/advisory/ntap-20211218-0001/
Added Reference 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
Added Reference 
https://www.debian.org/security/2021/dsa-5024
Added Reference 
https://www.kb.cert.org/vuls/id/930724
Added Reference 
https://www.oracle.com/security-alerts/cpuapr2022.html
Added Reference 
https://www.oracle.com/security-alerts/cpujan2022.html
Added Reference 
https://www.oracle.com/security-alerts/cpujul2022.html
Added Reference 
https://www.zerodayinitiative.com/advisories/ZDI-21-1541/

CVE Modified by Apache Software Foundation 5/14/2024 5:40:22 AM

Action Type Old Value New Value

Modified Analysis by NIST 10/06/2022 1:31:39 PM

Action Type Old Value New Value
Changed CPE Configuration Record truncated, showing 2048 of 5562 characters.
View Entire Change Record
OR
 *cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0:*:*:*:enterprise:*:*:*
 *cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:* versions from (including) 8.3.0.0 up to (including) 8.5.1.0
 *cpe:2.3:a:oracle:communications_interactive_session_recorder:6.3:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_interactive_session_recorder:6.4:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_service_broker:6.2:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_services_gatekeeper:7.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_webrtc_session_controller:7.2.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_webrtc_session_controller:7.2.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:* versions from (including) 8.0.7 up to (including) 8.1.1
 *cpe:2.3:a:oracle:financial_services_model_management_and_governance:8.0.8.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:financial_services_model_management_and_governance:8.1.0.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:financial_services_model_management_and_governance:8.1.1.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 17.12.0 up to (including) 17.12.11
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 18.8.0 up to (including) 18.8.13
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 19.12.0 up to (including) 19.12.12
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 20.12.0 up to (including) 20.12.7
 *cpe:2.3:a:oracle:primavera_gateway:21.12.0:*:*:*:*:*:*:*
 *cpe:2.3:a:o
 Record truncated, showing 2048 of 15857 characters.
View Entire Change Record
OR
 *cpe:2.3:a:oracle:agile_engineering_data_management:6.2.1.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:agile_plm:9.3.6:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:agile_plm_mcad_connector:3.6:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:autovue_for_agile_product_lifecycle_management:21.0.2:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_deposits_and_lines_of_credit_servicing:2.12.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_enterprise_default_management:2.7.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_enterprise_default_management:2.12.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_loans_servicing:2.12.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_party_management:2.7.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_payments:14.5:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_platform:2.6.2:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_platform:2.7.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_platform:2.12.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_trade_finance:14.5:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:banking_treasury_management:14.5:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0:*:*:*:enterprise:*:*:*
 *cpe:2.3:a:oracle:communications_asap:7.3:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.4:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_billing_and_revenue_management:12.0.0.5:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_console:1.9.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.15.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_cloud_native_core_securit
Changed Reference Type 
https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned


 
https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory
Changed Reference Type 
https://www.oracle.com/security-alerts/cpujul2022.html No Types Assigned


 
https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory

CVE Modified by Apache Software Foundation 7/25/2022 2:18:25 PM

Action Type Old Value New Value
Added Reference 
https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned]

CVE Modified by Apache Software Foundation 4/19/2022 8:16:33 PM

Action Type Old Value New Value
Added Reference 
https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned]

Modified Analysis by NIST 2/18/2022 11:42:47 PM

Action Type Old Value New Value
Added CPE Configuration Record truncated, showing 2048 of 5562 characters.
View Entire Change Record
OR
 *cpe:2.3:a:oracle:business_intelligence:5.5.0.0.0:*:*:*:enterprise:*:*:*
 *cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:* versions from (including) 8.3.0.0 up to (including) 8.5.1.0
 *cpe:2.3:a:oracle:communications_interactive_session_recorder:6.3:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_interactive_session_recorder:6.4:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_service_broker:6.2:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_services_gatekeeper:7.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_webrtc_session_controller:7.2.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:communications_webrtc_session_controller:7.2.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:financial_services_analytical_applications_infrastructure:*:*:*:*:*:*:*:* versions from (including) 8.0.7 up to (including) 8.1.1
 *cpe:2.3:a:oracle:financial_services_model_management_and_governance:8.0.8.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:financial_services_model_management_and_governance:8.1.0.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:financial_services_model_management_and_governance:8.1.1.0.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:instantis_enterprisetrack:17.1:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:managed_file_transfer:12.2.1.3.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:managed_file_transfer:12.2.1.4.0:*:*:*:*:*:*:*
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 17.12.0 up to (including) 17.12.11
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 18.8.0 up to (including) 18.8.13
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 19.12.0 up to (including) 19.12.12
 *cpe:2.3:a:oracle:primavera_gateway:*:*:*:*:*:*:*:* versions from (including) 20.12.0 up to (including) 20.12.7
 *cpe:2.3:a:oracle:primavera_gateway:21.12.0:*:*:*:*:*:*:*
 *cpe:2.3:a:o
Changed Reference Type 
https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned


 
https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory

CVE Modified by Apache Software Foundation 2/07/2022 11:16:37 AM

Action Type Old Value New Value
Added Reference 
https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned]

Modified Analysis by NIST 12/30/2021 11:22:23 AM

Action Type Old Value New Value
Added CVSS V3.1 
NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Removed CVSS V3.1 
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added CVSS V2 
NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Removed CVSS V2 
NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Changed CPE Configuration Record truncated, showing 2048 of 4459 characters.
View Entire Change Record
OR
 *cpe:2.3:a:apache:log4j:2.0:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:alpha1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:alpha2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta3:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta3-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta3-rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta4:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta4-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta5:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta6:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta6-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta7:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta7-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta7-rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta8:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta8-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta9:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:rc1-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0.1:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0.2:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.1:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.1:rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.1:rc3:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.2:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.3:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.4:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.4.1:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.5:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.5:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.1:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.1:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.2:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.2:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.7:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4
 
OR
 *cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:* versions from (including) 2.0 up to (excluding) 2.3.1
 *cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:* versions from (including) 2.4 up to (excluding) 2.12.3
 *cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:* versions from (including) 2.13.0 up to (including) 2.16.0
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:sonicwall:6bk1602-0aa12-0tp0_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.0
 OR
 cpe:2.3:h:sonicwall:6bk1602-0aa12-0tp0:-:*:*:*:*:*:*:*
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:sonicwall:6bk1602-0aa22-0tp0_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.0
 OR
 cpe:2.3:h:sonicwall:6bk1602-0aa22-0tp0:-:*:*:*:*:*:*:*
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:sonicwall:6bk1602-0aa32-0tp0_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.0
 OR
 cpe:2.3:h:sonicwall:6bk1602-0aa32-0tp0:-:*:*:*:*:*:*:*
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:sonicwall:6bk1602-0aa42-0tp0_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.0
 OR
 cpe:2.3:h:sonicwall:6bk1602-0aa42-0tp0:-:*:*:*:*:*:*:*
Added CPE Configuration 
AND
 OR
 *cpe:2.3:o:sonicwall:6bk1602-0aa52-0tp0_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.0
 OR
 cpe:2.3:h:sonicwall:6bk1602-0aa52-0tp0:-:*:*:*:*:*:*:*
Added CPE Configuration 
OR
 *cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:* versions up to (including) 10.0.12
 *cpe:2.3:a:sonicwall:network_security_manager:*:*:*:*:on-premises:*:*:* versions from (including) 2.0 up to (excluding) 3.0
 *cpe:2.3:a:sonicwall:network_security_manager:*:*:*:*:saas:*:*:* versions from (including) 2.0 up to (excluding) 3.0
 *cpe:2.3:a:sonicwall:web_application_firewall:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (excluding) 3.1.0
Changed Reference Type 
https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf No Types Assigned


 
https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf Third Party Advisory
Changed Reference Type 
https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf No Types Assigned


 
https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf Third Party Advisory
Changed Reference Type 
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 No Types Assigned


 
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 Third Party Advisory
Changed Reference Type 
https://www.kb.cert.org/vuls/id/930724 No Types Assigned


 
https://www.kb.cert.org/vuls/id/930724 Third Party Advisory, US Government Resource

CVE Modified by Apache Software Foundation 12/28/2021 12:15:07 PM

Action Type Old Value New Value
Changed Description 
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0 and 2.12.3.


 
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.
Removed Reference 
https://lists.debian.org/debian-lts-announce/2021/12/msg00017.html [No Types Assigned]
Removed Reference 
https://lists.fedoraproject.org/archives/list/[email protected]/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/ [No Types Assigned]
Removed Reference 
https://lists.fedoraproject.org/archives/list/[email protected]/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/ [No Types Assigned]

CVE Modified by Apache Software Foundation 12/26/2021 10:15:07 PM

Action Type Old Value New Value
Added Reference 
https://lists.fedoraproject.org/archives/list/[email protected]/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/ [No Types Assigned]
Added Reference 
https://lists.fedoraproject.org/archives/list/[email protected]/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/ [No Types Assigned]

CVE Modified by Apache Software Foundation 12/26/2021 7:15:08 PM

Action Type Old Value New Value
Added Reference 
https://lists.debian.org/debian-lts-announce/2021/12/msg00017.html [No Types Assigned]

CVE Modified by Apache Software Foundation 12/21/2021 8:15:07 PM

Action Type Old Value New Value
Added Reference 
https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf [No Types Assigned]

CVE Modified by Apache Software Foundation 12/21/2021 6:15:07 AM

Action Type Old Value New Value
Added Reference 
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 [No Types Assigned]

CVE Modified by Apache Software Foundation 12/21/2021 1:15:06 AM

Action Type Old Value New Value
Added Reference 
https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf [No Types Assigned]
Added Reference 
https://www.kb.cert.org/vuls/id/930724 [No Types Assigned]

Initial Analysis by NIST 12/20/2021 1:48:03 PM

Action Type Old Value New Value
Added CVSS V3.1 
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added CVSS V2 
NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
Added CWE 
NIST CWE-20
Added CWE 
NIST CWE-674
Added CPE Configuration Record truncated, showing 2048 of 4459 characters.
View Entire Change Record
OR
 *cpe:2.3:a:apache:log4j:2.0:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:alpha1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:alpha2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta3:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta3-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta3-rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta4:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta4-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta5:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta6:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta6-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta7:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta7-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta7-rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta8:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta8-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:beta9:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:rc1-rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0:rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0.1:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.0.2:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.1:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.1:rc2:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.1:rc3:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.2:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.3:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.4:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.4.1:*:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.5:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.5:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.1:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.1:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.2:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.6.2:rc1:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4j:2.7:-:*:*:*:*:*:*
 *cpe:2.3:a:apache:log4
Added CPE Configuration 
OR
 *cpe:2.3:a:netapp:cloud_manager:-:*:*:*:*:*:*:*
Added CPE Configuration 
OR
 *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
 *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Changed Reference Type 
http://www.openwall.com/lists/oss-security/2021/12/19/1 No Types Assigned


 
http://www.openwall.com/lists/oss-security/2021/12/19/1 Mailing List, Mitigation, Third Party Advisory
Changed Reference Type 
https://logging.apache.org/log4j/2.x/security.html No Types Assigned


 
https://logging.apache.org/log4j/2.x/security.html Release Notes, Vendor Advisory
Changed Reference Type 
https://security.netapp.com/advisory/ntap-20211218-0001/ No Types Assigned


 
https://security.netapp.com/advisory/ntap-20211218-0001/ Third Party Advisory
Changed Reference Type 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd No Types Assigned


 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd Third Party Advisory
Changed Reference Type 
https://www.debian.org/security/2021/dsa-5024 No Types Assigned


 
https://www.debian.org/security/2021/dsa-5024 Third Party Advisory
Changed Reference Type 
https://www.zerodayinitiative.com/advisories/ZDI-21-1541/ No Types Assigned


 
https://www.zerodayinitiative.com/advisories/ZDI-21-1541/ Third Party Advisory, VDB Entry

CVE Modified by Apache Software Foundation 12/19/2021 7:15:09 PM

Action Type Old Value New Value
Added Reference 
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd [No Types Assigned]

CVE Modified by Apache Software Foundation 12/19/2021 11:15:07 AM

Action Type Old Value New Value
Added Reference 
https://www.zerodayinitiative.com/advisories/ZDI-21-1541/ [No Types Assigned]

CVE Modified by Apache Software Foundation 12/19/2021 10:15:07 AM

Action Type Old Value New Value
Added Reference 
https://www.debian.org/security/2021/dsa-5024 [No Types Assigned]

CVE Modified by Apache Software Foundation 12/18/2021 11:15:06 PM

Action Type Old Value New Value
Added Reference 
http://www.openwall.com/lists/oss-security/2021/12/19/1 [No Types Assigned]

CVE Modified by Apache Software Foundation 12/18/2021 11:15:07 AM

Action Type Old Value New Value
Added Reference 
https://security.netapp.com/advisory/ntap-20211218-0001/ [No Types Assigned]

Quick Info

CVE Dictionary Entry:
CVE-2021-45105
NVD Published Date:
12/18/2021
NVD Last Modified:
06/17/2026
Source:
Apache Software Foundation