Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-44228

10.0 · CRITICALActively Exploited

Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker cont…

Published Dec 10, 2021CWE-20EPSS 100.00%

Overview

CVE-2021-44228 is a critical-severity vulnerability. It was published on December 10, 2021 and has a CVSS 3.1 base score of 10.0 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.htmlRefpacketstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.htmlRefpacketstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.htmlRefpacketstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.htmlRefpacketstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.htmlRefpacketstormsecurity.com/files/165282/Log4j-Payload-Generator.htmlRefpacketstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.htmlRefpacketstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.htmlRefpacketstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.htmlRefpacketstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-44228?

CVE-2021-44228 is a critical-severity vulnerability. It was published on December 10, 2021 and has a CVSS 3.1 base score of 10.0 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2021-44228?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-44228?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-44228?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-44228 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related CRITICAL CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999