CVE-2021-45046

critical-risk

Published 2021-12-14

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.

Do I need to act?

94.3% chance of exploitation in next 30 days

EPSS score — higher than 6% of all CVEs

CISA KEV: actively exploited in the wild

On the Known Exploited Vulnerabilities catalog — federal agencies must patch

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.0/10 Critical

NETWORK / HIGH complexity

Affected Products (20)

Log4J

Computer Vision Annotation Tool

Audio Development Kit

Datacenter Manager

Genomics Kernel Library

Oneapi

Secure Device Onboard

Sensor Solution Firmware Development Kit

System Debugger

System Studio

Sppa-T3000 Ses3000 Firmware

Captial

Comos

Desigo Cc Advanced Reports

Affected Vendors

Debian Apache Siemens Intel Sonicwall Fedoraproject Cvat

References (43)

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

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

Mailing List http://www.openwall.com/lists/oss-security/2021/12/18/1

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

Mailing List https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

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

Third Party 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-a...

Not Applicable https://www.cve.org/CVERecord?id=CVE-2021-44228

Third Party Advisory 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....

Third Party Advisory https://www.kb.cert.org/vuls/id/930724

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

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

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

and 23 more references

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critical-risk

Severity 26/34 · High

Exploitability 27/34 · High

Exposure 29/34 · Critical