CVE-2021-45046

critical

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

http://www.openwall.com/lists/oss-security/2021/12/14/4

https://logging.apache.org/log4j/2.x/security.html

https://www.cve.org/CVERecord?id=CVE-2021-44228

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00646.html

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd

http://www.openwall.com/lists/oss-security/2021/12/15/3

https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf

https://www.kb.cert.org/vuls/id/930724

https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdf

https://www.debian.org/security/2021/dsa-5022

https://www.oracle.com/security-alerts/alert-cve-2021-44228.html

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032

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://lists.fedoraproject.org/archives/list/[email protected]/message/EOKPQGV24RRBBI4TBZUDQMM4MEH7MXCY/

https://lists.fedoraproject.org/archives/list/[email protected]/message/SIG7FZULMNK2XF6FZRU4VWYDQXNMUGAJ/

https://www.oracle.com/security-alerts/cpujan2022.html

https://www.oracle.com/security-alerts/cpuapr2022.html

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

Details

Source: MITRE

Published: 2021-12-14

Updated: 2022-07-25

Type: CWE-502

Risk Information

CVSS v2

Base Score: 5.1

Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 4.9

Severity: MEDIUM

CVSS v3

Base Score: 9

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Impact Score: 6

Exploitability Score: 2.2

Severity: CRITICAL