| VID |
210209 |
| Severity |
40 |
| Port |
22 |
| Protocol |
TCP |
| Class |
LSC |
| Detailed Description |
According to its self-reported version number, the installation of log4j installed on the remote host is affected by vulnerability:
Apache Log4j2 <=2.14.1 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. In previous releases (>2.10) this behavior can be mitigated by setting system property "log4j2.formatMsgNoLookups" to ¡°true¡± or by removing the JndiLookup class from the classpath (example: zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class). Java 8u121 (see https://www.oracle.com/java/technologies/javase/8u121-relnotes.html) protects against remote code execution by defaulting "com.sun.jndi.rmi.object.trustURLCodebase" and "com.sun.jndi.cosnaming.object.trustURLCodebase" to "false".
* Caution: For remote detection of Apache log4j Log4Shell, check after turning off the Windows firewall of the scanner server)
* References:
http://packetstormsecurity.com/files/165225/Apache-Log4j2-2.14.1-Remote-Code-Execution.html
http://www.openwall.com/lists/oss-security/2021/12/10/1
http://www.openwall.com/lists/oss-security/2021/12/10/2
http://www.openwall.com/lists/oss-security/2021/12/10/3
http://www.openwall.com/lists/oss-security/2021/12/13/1
http://www.openwall.com/lists/oss-security/2021/12/13/2
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VU57UJDCFIASIO35GC55JMKSRXJMCDFM/
https://logging.apache.org/log4j/2.x/security.html
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032
https://security.netapp.com/advisory/ntap-20211210-0007/
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd
https://www.oracle.com/security-alerts/alert-cve-2021-44228.html
* Platforms Affected:
log4j 2.x prior to 2.15.0 |
| Recommendation |
Upgrade to the latest version of log4j (2.15.0 or later), available from the Apache Software Foundation download site, https://logging.apache.org/log4j/ |
| Related URL |
CVE-2021-44228 (CVE) |
| Related URL |
(SecurityFocus) |
| Related URL |
(ISS) |
|
