CVE-2021-45046
Apache Software Foundation · published 2021-12-14
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2023-05-01).
- CISA's name for it: Apache Log4j2 Deserialization of Untrusted Data Vulnerability
- CISA's description: Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations.
- Known ransomware campaign use, per CISA: Known
Source: CISA KEV catalog (CC0 1.0).
Description
Description by Apache Software Foundation via the CVE Program.
It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Log4j | Apache Log4j2 – before 2.16.0: affected |
Products named in NVD's CPE match criteria (50)
cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*cpe:2.3:a:cvat:computer_vision_annotation_tool:-:*:*:*:*:*:*:*cpe:2.3:a:intel:audio_development_kit:-:*:*:*:*:*:*:*cpe:2.3:a:intel:datacenter_manager:-:*:*:*:*:*:*:*cpe:2.3:a:intel:genomics_kernel_library:-:*:*:*:*:*:*:*cpe:2.3:a:intel:oneapi:-:*:*:*:*:eclipse:*:*cpe:2.3:a:intel:secure_device_onboard:-:*:*:*:*:*:*:*cpe:2.3:a:intel:sensor_solution_firmware_development_kit:-:*:*:*:*:*:*:*cpe:2.3:a:intel:system_debugger:-:*:*:*:*:*:*:*cpe:2.3:a:intel:system_studio:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:sppa-t3000_ses3000_firmware:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:captial:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:comos:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:desigo_cc_advanced_reports:4.0:*:*:*:*:*:*:*cpe:2.3:a:siemens:desigo_cc_info_center:5.0:*:*:*:*:*:*:*cpe:2.3:a:siemens:e-car_operation_center:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:energy_engage:3.1:*:*:*:*:*:*:*cpe:2.3:a:siemens:energyip:8.5:*:*:*:*:*:*:*cpe:2.3:a:siemens:energyip_prepay:3.7:*:*:*:*:*:*:*cpe:2.3:a:siemens:gma-manager:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:head-end_system_universal_device_integration_system:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:industrial_edge_management:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:industrial_edge_management_hub:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:logo\!_soft_comfort:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:mendix:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:mindsphere:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:navigator:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:nx:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:opcenter_intelligence:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:operation_scheduler:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:sentron_powermanager:4.1:*:*:*:*:*:*:*cpe:2.3:a:siemens:siguard_dsa:4.2:*:*:*:*:*:*:*cpe:2.3:a:siemens:sipass_integrated:2.80:*:*:*:*:*:*:*cpe:2.3:a:siemens:siveillance_command:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:siveillance_control_pro:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:siveillance_identity:1.5:*:*:*:*:*:*:*cpe:2.3:a:siemens:siveillance_vantage:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:siveillance_viewpoint:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:solid_edge_cam_pro:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:solid_edge_harness_design:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:spectrum_power_4:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:spectrum_power_7:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:teamcenter:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:tracealertserverplus:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:vesys:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:xpedition_enterprise:-:*:*:*:*:*:*:*cpe:2.3:a:siemens:xpedition_package_integrator:-:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:a:sonicwall:email_security:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 9 CRITICAL — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 3.1: 9 CRITICAL — as published by CISA-ADP (Secondary)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 2.0: 5.1 MEDIUM — as published by NIST (Primary)
AV:N/AC:H/Au:N/C:P/I:P/A:P - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- http://www.openwall.com/lists/oss-security/2021/12/14/4
- http://www.openwall.com/lists/oss-security/2021/12/15/3
- http://www.openwall.com/lists/oss-security/2021/12/18/1
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/
- https://logging.apache.org/log4j/2.x/security.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032
- https://security.gentoo.org/glsa/202310-16
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
- https://www.cve.org/CVERecord?id=CVE-2021-44228
- https://www.debian.org/security/2021/dsa-5022
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html
- https://www.kb.cert.org/vuls/id/930724
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html
- 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/2021/12/14/4
- http://www.openwall.com/lists/oss-security/2021/12/15/3
- http://www.openwall.com/lists/oss-security/2021/12/18/1
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/
The source lists more references.
Source dates: published 2021-12-14, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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