CVE-2021-44228
Apache Log4j2 Remote Code Execution Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 24 December 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 100.00% probability · 100th percentile
- CISA KEV
- Listed 10 December 2021 · due 24 December 2021 · used in ransomware campaigns
- Weakness
- CWE-20, CWE-400, CWE-502, CWE-917
- Affected
- siemens/6bk1602-0aa12-0tp0 firmware · siemens/6bk1602-0aa22-0tp0 firmware · siemens/6bk1602-0aa32-0tp0 firmware · siemens/6bk1602-0aa42-0tp0 firmware · siemens/6bk1602-0aa52-0tp0 firmware · apache/log4j · siemens/sppa-t3000 ses3000 firmware · siemens/capital · siemens/comos · siemens/desigo cc advanced reports · siemens/desigo cc info center · siemens/e-car operation center · siemens/energy engage · siemens/energyip · siemens/energyip prepay · siemens/gma-manager · siemens/head-end system universal device integration system · siemens/industrial edge management · siemens/industrial edge management hub · siemens/logo\! soft comfort · +40 more
- Source
- security@apache.org
CISA notes
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. https://nvd.nist.gov/vuln/detail/CVE-2021-44228
References
- http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165260/VMware-Security-Advisory-2021-0028.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165261/Apache-Log4j2-2.14.1-Information-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165270/Apache-Log4j2-2.14.1-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165281/Log4j2-Log4Shell-Regexes.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165282/Log4j-Payload-Generator.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165306/L4sh-Log4j-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165307/Log4j-Remote-Code-Execution-Word-Bypassing.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165311/log4j-scan-Extensive-Scanner.htmlBroken Link, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165371/VMware-Security-Advisory-2021-0028.4.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165532/Log4Shell-HTTP-Header-Injection.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165642/VMware-vCenter-Server-Unauthenticated-Log4Shell-JNDI-Injection-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/165673/UniFi-Network-Application-Unauthenticated-Log4Shell-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.htmlThird Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/167917/MobileIron-Log4Shell-Remote-Command-Execution.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/171626/AD-Manager-Plus-7122-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2022/Dec/2Exploit, Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Jul/11Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Mar/23Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/10/1Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/10/2Mailing List, Mitigation, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/10/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/13/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/13/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/14/4Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/12/15/3Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-397453.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdfThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-714170.pdfThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.