Synology Security Advisory SA-21:30 Log4Shell

Synology, Inc. has published a security advisory concerning Log4Shell vulnerability.

Publish time: 2021-12-13 18:29:31 UTC+8
Last updated: 2021-12-13 18:29:31 UTC+8
Severity: Not affected
Status: Resolved

Abstract
None of Synology’s products are affected as CVE-2021-44228 only affects products equipped with log4j 2.

Affected products

Mitigation: None
Detail: CVE-2021-44228
Severity: Not affected
CVSS3 base score: 0.0
CVSS3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
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 it can be mitigated in prior releases (<2.10) by removing the JndiLookup class from the classpath (example: zip -q -d log4j-core-*.jar org/apache/logging/log4j/core/lookup/JndiLookup.class).

Reference

• Apache Releases Log4j Version 2.15.0 to Address Critical RCE Vulnerability Under Exploitation

• CVE-2021-44228

Revision