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Referencesįixed in Log4j 2.17.0 (Java 8), 2.12.3 (Java 7) and 2.3.1 (Java 6)Īpache Log4j2 does not always protect from infinite recursion in lookup evaluation CVE-2021-45105ĥ.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)Īll versions from 2.0-alpha1 to 2.16.0, excluding 2.12.3Īpache Log4j2 versions 2.0-alpha1 through 2.16.0, excluding 2.12.3, did not protect from uncontrolled recursion from self-referential lookups. No credit is being awarded for this issue.

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The Log4j team will continue to actively update this page as more information becomes known. JNDI functionality has been hardened in these versions: 2.3.1, 2.12.2, 2.12.3 or 2.17.0:įrom these versions onwards, support for the LDAP protocol has been removed and only the JAVA protocol is supported in JNDI connections. To three separate properties: log4j2.enableJndiLookup, log4j2.enableJndiJms, and log4j2.enableJndiContextSelector.

The property to enable JNDI has been renamed from ‘log4j2.enableJndi’ The JDBC Appender will use JndiManager and will require the log4j2.enableJndiJdbc system property to contain Release Detailsįrom version 2.17.1, (and 2.12.4 and 2.3.2 for Java 7 and Java 6), Other projects like Log4net and Log4cxx are not impacted by this. Note that only the log4j-core JAR file is impacted by this vulnerability.Īpplications using only the log4j-api JAR file without the log4j-core JAR file are not impacted by this vulnerability.Īlso note that Apache Log4j is the only Logging Services subproject affected by this vulnerability. In prior releases confirm that if the JDBC Appender is being used it is not configured to use any protocol Log4j 1.x is not impacted by this vulnerability.

This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1,Ģ.12.4, and 2.3.2.

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CVE-2021-44832Ħ.6 (AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)Īll versions from 2.0-beta7 to 2.17.0, excluding 2.3.2 and 2.12.4Īpache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable toĪ remote code execution (RCE) attack where an attacker with permission to modify the logging configuration file canĬonstruct a malicious configuration using a JDBC Appender with a data source referencing a JNDI URI which can execute Thank you for your understanding and help!įixed in Log4j 2.17.1 (Java 8), 2.12.4 (Java 7) and 2.3.2 (Java 6)Īpache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration. Note that reports assuming attacker's access to the Log4j configuration will not qualify as a vulnerability. That has security impact, or if the descriptions here are incomplete, please report them If you have encountered an unlisted security vulnerability or other unexpected behaviour Subscribe to, and send your questions to the public To mitigate the known vulnerabilities listed here, please If you need help on building or configuring Log4j or other help on following the instructions Use the building instructions for the Apache Log4j version that you are using.įor Log4j 2 these can be found in BUILDING.md located in the root subdirectory of the source distribution. If you need to apply a source code patch,

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Users should upgrade to Log4j 2 to obtain security fixes.īinary patches are never provided. Vulnerabilities reported after August 2015 against Log4j 1.x were not checked and will not be fixed. Of Apache Log4j the flaw is known to affect, and where a flaw has not been verified list Note that this rating may vary from platform to platform. This page lists all the security vulnerabilities fixed in released versions of Apache Log4j 2.Įach vulnerability is given a security impact rating

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