Log4Shell — Apache Log4j RCE
CVE-2021-44228
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 endpoin…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Apache Log4j — versions 2.0
- Apache Software Foundation Log4j2 — versions 2.0-beta9
- Apple Xcode
- Bentley Synchro
- Bentley Synchro_4d
- Cisco Advanced_malware_protection_virtual_private_cloud_appliance
- Cisco Automated_subsea_tuning — versions 02.01.00
- Cisco Broadworks
- Cisco Business_process_automation
- Cisco Cloudcenter
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- security@apache.org (Release Notes, Vendor Advisory)
- security@apache.org (mailing-list, Mailing List, Third Party Advisory, Mitigation)
- security@apache.org (mailing-list, Mailing List, Third Party Advisory, Mitigation)
- security@apache.org (vendor-advisory, Third Party Advisory)
- security@apache.org (mailing-list, Mailing List, Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (VDB Entry, Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (Third Party Advisory)
- security@apache.org (vendor-advisory, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44228?
- CVE-2021-44228 is a critical-severity vulnerability in Apache Log4j, classified under Improper Input Validation. CVSS score: 10.0/10. Published 2021-12-10.
- How severe is CVE-2021-44228?
- Critical severity. CVSS v3 base score is 10.0 out of 10.
- Is CVE-2021-44228 known to be exploited?
- Yes. CVE-2021-44228 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-12-10), indicating it is being actively exploited. 2278 public proof-of-concept repositories are indexed.