CVE-2021-44228

critical

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.

From the Tenable Blog

CVE-2021-44228, CVE-2021-45046, CVE-2021-4104: Frequently Asked Questions About Log4Shell and Associated Vulnerabilities

CVE-2021-44228, CVE-2021-45046, CVE-2021-4104: Frequently Asked Questions About Log4Shell and Associated Vulnerabilities

Published: 2021-12-17

A list of frequently asked questions related to Log4Shell and associated vulnerabilities.

CVE-2021-44228: Proof-of-Concept for Critical Apache Log4j Remote Code Execution Vulnerability Available (Log4Shell)

CVE-2021-44228: Proof-of-Concept for Critical Apache Log4j Remote Code Execution Vulnerability Available (Log4Shell)

Published: 2021-12-10

Critical vulnerability in the popular logging library, Log4j 2, impacts a number of services and applications, including Minecraft, Steam and Apple iCloud. Attackers have begun actively scanning for and attempting to exploit the flaw.

References

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

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

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

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

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

https://www.debian.org/security/2021/dsa-5020

https://www.bentley.com/en/common-vulnerability-exposure/be-2022-0001

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

https://www.edgescan.com/wp-content/uploads/2024/03/2023-Vulnerability-Statistics-Report.pdf

https://securelist.com/vulnerabilities-and-exploits-in-q4-2024/115761/

https://www.darkreading.com/vulnerabilities-threats/emerging-threats-vulnerabilities-prepare-2025

https://securelist.com/exploits-and-vulnerabilities-q3-2024/114839/

https://www.securityweek.com/citrix-cisco-fortinet-zero-days-among-2023s-most-exploited-vulnerabilities/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-317a

https://www.securityweek.com/two-years-on-log4shell-vulnerability-still-being-exploited-to-deploy-malware/

https://securelist.com/vulnerability-exploit-report-q2-2024/113455/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a

https://www.wsj.com/politics/national-security/u-s-allies-issue-rare-warning-on-chinese-hacking-group-9eebb0ce

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-190a

https://securityaffairs.com/164838/breaking-news/excobalt-cybercrime-group-targets-russian-orgs.html

https://www.imperva.com/blog/update-cve-2024-4577-quickly-weaponized-to-distribute-tellyouthepass-ransomware/

https://www.akamai.com/blog/security-research/2024-redtail-cryptominer-pan-os-cve-exploit

https://thehackernews.com/2024/05/ghostengine-exploits-vulnerable-drivers.html

https://blog.xlab.qianxin.com/catddos-derivative-en/

https://securelist.com/vulnerability-report-q1-2024/112554/

https://veriti.ai/blog/vulnerable-villain-when-hackers-get-hacked/

https://thehackernews.com/2024/03/hackers-exploit-misconfigured-yarn.html

https://meterpreter.org/linux-windows-users-beware-8220-gangs-crypto-assault/

https://thehackernews.com/2023/12/behind-scenes-of-matveevs-ransomware.html

https://www.cisa.gov/news-events/cybersecurity-advisories/aa22-152a?&web_view=true

https://www.imperva.com/blog/imperva-detects-undocumented-8220-gang-activities/?web_view=true

https://cyberscoop.com/north-korea-lazarus-log4j-log4shell/

https://cyware.com/resources/research-and-analysis/beneath-the-surface-avoslockers-ransomware-as-a-service-and-cybercrime-tactics-f14f

https://www.secureworks.com/research/gold-melody-profile-of-an-initial-access-broker?&web_view=true

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-215a

https://www.tenable.com/cyber-exposure/tenable-2022-threat-landscape-report

https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-040a

https://www.netwitness.com/wp-content/uploads/FIN13-Elephant-Beetle-NetWitness.pdf

https://www.trendmicro.com/en_th/research/22/e/avoslocker-ransomware-variant-abuses-driver-file-to-disable-anti-Virus-scans-log4shell.html

https://www.cisa.gov/news-events/cybersecurity-advisories/aa22-117a

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

https://www.microsoft.com/en-us/security/blog/2021/12/11/guidance-for-preventing-detecting-and-hunting-for-cve-2021-44228-log4j-2-exploitation/

https://checkmarx.com/blog/cve-2022-42889-text4shell-vulnerability-breakdown/

https://www.tenable.com/blog/from-bugs-to-breaches-25-significant-cves-as-mitre-cve-turns-25

https://www.tenable.com/blog/aa23-250a-multiple-nation-state-threat-actors-exploit-cve-2022-47966-and-cve-2022-42475

https://www.tenable.com/blog/aa23-215a-2022s-top-routinely-exploited-vulnerabilities

https://www.tenable.com/blog/south-korean-and-american-agencies-release-joint-advisory-on-north-korean-ransomware

https://www.tenable.com/blog/cisa-top-20-cves-exploited-peoples-republic-of-china-state-sponsored-actors-aa22-279a

https://www.tenable.com/blog/aa22-257a-cybersecurity-joint-advisory-on-iranian-islamic-revolutionary-guard-ransomware

https://www.tenable.com/blog/hot-patches-for-log4shell-introduced-multiple-vulnerabilities-in-amazon-web-services

https://www.tenable.com/blog/spring4shell-faq-spring-framework-remote-code-execution-vulnerability

https://www.tenable.com/blog/contileaks-chats-reveal-over-30-vulnerabilities-used-by-conti-ransomware-affiliates

https://www.tenable.com/blog/behind-the-scenes-how-we-picked-2021s-top-vulnerabilities-and-what-we-left-out

https://www.tenable.com/blog/oracle-january-2022-critical-patch-update-addresses-266-cves

https://www.tenable.com/blog/cve-2021-44228-cve-2021-45046-cve-2021-4104-frequently-asked-questions-about-log4shell

https://www.tenable.com/blog/cve-2021-44228-proof-of-concept-for-critical-apache-log4j-remote-code-execution-vulnerability

https://www.nu11secur1ty.com/2021/12/cve-2021-44228.html

https://twitter.com/kurtseifried/status/1469345530182455296

Details

Source: Mitre, NVD

Published: 2021-12-10

Updated: 2025-04-03

Named Vulnerability: log4jNamed Vulnerability: Log4jNamed Vulnerability: Log4ShellNamed Vulnerability: Log4JKnown Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 9.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 10

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.94381