![]() ![]() I worked around the issue by switching to a different logging tool. The classpath.txt file can probably be used to resolve this, ie remove log4j from the classpath.txt but this may break Matlab's internal logging. ![]() I managed to work around a similar issue with logback, in that logback complains about Matlab's use of log4j. Is there a problem using log4j2 from within Matlab?Įdit: I believe this is related to the inbuilt usage of log4j in Matlab for Matlab's own internal logging. I have no configuration file defined, I expected log4j to give me the default configuration and log to the console (as per log4j2 docs) This.logger = LogManager.getLogger(m圜lassNameAsString) īut when I inspect the Logger object I see: K> this.logger Does the error matter If so, what are my options I'm on R2020A on Linux. log4j was removed at my company due to security issues. In my Matlab class constructor I: import 4j.LogManager How can I fix log4j error on Matlab startup Ask Question Asked 5 months ago Modified 5 months ago Viewed 69 times 0 I get the below error when starting Matlab. Microsoft Visual studio and have no exposure to the Log4j vulnerability. Updating the affected component to the latest version currently 2.17.0 for Java 8 and newer is the best way to mitigate the flaws identified so far: CVE-2021-44228, also known as Log4Shell. I have added and to my Matlab java classpath. Resolve: Reinstall the matlab runtime mcr version 9.0 installer (found in the. Patch and Mitigation, or the first link above.I'm trying to switch from log4j 1.2 to log4j 2 in a Matlab application. If you must keep the log4j.jar file because your software depends on it then it is recommended you switch to log4j version 2 and follow the suggestions as described for example at: We recommend that you review this release from The Mathworks on this issue and contact them with any additional queries.įinally, note that Log4j version 1 is old and has other vulnerabilities so we recommend that you remove the Matlab-related log4j.jar file. The default Windows location for compiled products (Solo, Solo+MIA, or Solo_Predictor) is, for example Solo_Predictor:Ĭ:\Program Files\EVRI\Solo_Predictor\application\java\jarext\log4j.jarĬ:\Program Files\MATLAB\MATLAB Runtime\v99\java\jarext\log4j.jar The file should be listed by the appropriate search tool and our limited testing thus far indicates no issues with Solo or Solo_Predictor. ![]() Note that under macOS and Linux, you will have to navigate inside of the application bundle for MATLAB under those platforms.įor our compiled products Solo (and variants) and Solo_Predictor, this log4j.jar file will found under the folder structure for the MATLAB Runtime engine, the location of which is operating system dependent. If you have installed the Matlab Runtime separately then it will be installed there, for example at:Ĭ:\Program Files\MATLAB\MATLAB Runtime\v99\java\jarext If you are a PLS_Toolbox user, you will find this file starting from the top level MATLAB folder under topLevelMATLABfolder/java/jarext, for example if you are using Matlab R2020b:Ĭ:\Program Files\MATLAB\R2020b\java\jarext PLS_Toolbox or compiled products (Solo, Solo+MIA, Solo_Predictor.) should work normally as they do not depend on log4j. Our testing thus far indicates that removal of the Matab log4j.jar file will not affect EVRI software other than causing some error messages to appear upon the startup of MATLAB. We do not use log4j in Eigenvector software. It is only when log4j is used on an exposed server that the vulnerability can be a problem. The presence of a log4j jar file on a computer does not imply a vulnerability. As such, MathWorks general release and server products are not vulnerable to CVE-2021. Apache Log4j Security Vulnerabilities states "Log4j 1.x is not impacted by this vulnerability.". No version of released MATLAB implements the JDBC Appender by default. This instance of log4j is the older version 1, which does not have the Log4Shell vulnerability. See Wikipedia: Log4Shell Possible Solutions:Īll of our products are based upon the MATLAB platform, and each installation of MATLAB includes a copy of the log4j.jar file. What should I do about the log4j.jar security issue "Log4Shell" discovered in December 2021? ![]()
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