CVEvulnerability
CVE-2021-45046
CISA Known Exploited Vulnerability
Apache Log4j2 Deserialization of Untrusted Data Vulnerability — Apache Log4j2
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.
- Added to KEV
- 2023-05-01
- Remediation due
- 2023-05-22
- Ransomware use
- Known
- Required action
- Apply updates per vendor instructions.
- Notes
- https://logging.apache.org/log4j/2.x/security.html; https://nvd.nist.gov/vuln/detail/CVE-2021-45046
- Status
- Analyzed
- Published
- 2021-12-14
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.0 CRITICAL — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.0 CRITICAL — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 5.1 MEDIUM — AV:N/AC:H/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-917
Description
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.
Affected configurations
• apache log4j (>= 2.0.1 < 2.12.2)
• apache log4j (>= 2.13.0 < 2.16.0)
• apache log4j 2.0
• cvat computer vision annotation tool
• intel audio development kit
• intel datacenter manager
• intel genomics kernel library
• intel oneapi
• intel secure device onboard
• intel sensor solution firmware development kit
• intel system debugger
• intel system studio
• siemens sppa-t3000 ses3000 firmware
• siemens captial (< 2019.1)
• siemens captial 2019.1
• siemens comos
• siemens desigo cc advanced reports 4.0
• siemens desigo cc advanced reports 4.1
• siemens desigo cc advanced reports 4.2
• siemens desigo cc advanced reports 5.0
• siemens desigo cc advanced reports 5.1
• siemens desigo cc info center 5.0
• siemens desigo cc info center 5.1
• siemens e-car operation center (< 2021-12-13)
• siemens energy engage 3.1
• siemens energyip 8.5
• siemens energyip 8.6
• siemens energyip 8.7
• siemens energyip 9.0
• siemens energyip prepay 3.7
• siemens energyip prepay 3.8
• siemens gma-manager (< 8.6.2j-398)
• siemens head-end system universal device integration system
• siemens industrial edge management
• siemens industrial edge management hub (< 2021-12-13)
• siemens logo\! soft comfort
• siemens mendix
• siemens mindsphere (< 2021-12-11)
• siemens navigator (< 2021-12-13)
• siemens nx
• siemens opcenter intelligence (<= 3.2)
• siemens operation scheduler (<= 1.1.3)
• siemens sentron powermanager 4.1
• siemens sentron powermanager 4.2
• siemens siguard dsa 4.2
• siemens siguard dsa 4.3
• siemens siguard dsa 4.4
• siemens sipass integrated 2.80
• siemens sipass integrated 2.85
• siemens siveillance command (<= 4.16.2.1)
• siemens siveillance control pro
• siemens siveillance identity 1.5
• siemens siveillance identity 1.6
• siemens siveillance vantage
• siemens siveillance viewpoint
• siemens solid edge cam pro
• siemens solid edge harness design (< 2020)
• siemens solid edge harness design 2020
• siemens spectrum power 4 (< 4.70)
• siemens spectrum power 4 4.70
… and 18 more
Related
Weakness · CWE (1)
- CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement weakness
References
- http://www.openwall.com/lists/oss-security/2021/12/14/4 Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/15/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/18/1 Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/ Mailing List, Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/ Mailing List, Release Notes
- https://logging.apache.org/log4j/2.x/security.html Mitigation, Release Notes, Vendor Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 Third Party Advisory
- https://security.gentoo.org/glsa/202310-16 Third Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2021-44228 Not Applicable
- https://www.debian.org/security/2021/dsa-5022 Third Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html Third Party Advisory
- https://www.kb.cert.org/vuls/id/930724 Third Party Advisory, US Government Resource
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.html Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/14/4 Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/15/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/18/1 Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/ Mailing List, Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/ Mailing List, Release Notes
- https://logging.apache.org/log4j/2.x/security.html Mitigation, Release Notes, Vendor Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 Third Party Advisory
- https://security.gentoo.org/glsa/202310-16 Third Party Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2021-44228 Not Applicable
- https://www.debian.org/security/2021/dsa-5022 Third Party Advisory
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html Third Party Advisory
- https://www.kb.cert.org/vuls/id/930724 Third Party Advisory, US Government Resource
- https://www.oracle.com/security-alerts/alert-cve-2021-44228.html Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.html Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-45046 US Government Resource