CVE - CVE-2021-45046

CVE-ID
CVE-2021-45046	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CERT-VN:VU#930724 URL:https://www.kb.cert.org/vuls/id/930724 CISCO:20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021 URL:https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf URL:https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdf CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf URL:https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf URL:https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf URL:https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf CONFIRM:https://logging.apache.org/log4j/2.x/security.html URL:https://logging.apache.org/log4j/2.x/security.html CONFIRM:https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 URL:https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 CONFIRM:https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html URL:https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html CONFIRM:https://www.oracle.com/security-alerts/alert-cve-2021-44228.html URL:https://www.oracle.com/security-alerts/alert-cve-2021-44228.html DEBIAN:DSA-5022 URL:https://www.debian.org/security/2021/dsa-5022 FEDORA:FEDORA-2021-5c9d12a93e URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/ FEDORA:FEDORA-2021-abbe24e41c URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/ MISC:https://www.cve.org/CVERecord?id=CVE-2021-44228 URL:https://www.cve.org/CVERecord?id=CVE-2021-44228 MISC:https://www.oracle.com/security-alerts/cpuapr2022.html URL:https://www.oracle.com/security-alerts/cpuapr2022.html MISC:https://www.oracle.com/security-alerts/cpujan2022.html URL:https://www.oracle.com/security-alerts/cpujan2022.html MISC:https://www.oracle.com/security-alerts/cpujul2022.html URL:https://www.oracle.com/security-alerts/cpujul2022.html MLIST:[oss-security] 20211214 CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack URL:http://www.openwall.com/lists/oss-security/2021/12/14/4 MLIST:[oss-security] 20211215 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack URL:http://www.openwall.com/lists/oss-security/2021/12/15/3 MLIST:[oss-security] 20211218 Re: CVE-2021-45046: Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack URL:http://www.openwall.com/lists/oss-security/2021/12/18/1
Assigning CNA
Apache Software Foundation
Date Record Created
20211214	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20211214)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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