Researchers from DrWeb monitored attacks leveraging exploits for vulnerabilities in the Apache Log4j library

Researchers from DrWeb monitored attacks leveraging exploits for vulnerabilities (CVE-2021-44228, CVE-2021-45046, CVE2021-4104, and CVE-2021-42550) in the Apache Log4j library warning of the need to adopt protective measures.

The vulnerabilities can allow threat actors to execute arbitrary code on the target systems, trigger a Denial of Service condition, or disclose confidential information.

Dr. Web set up one of its honeypots to analyze the impact of the Log4J vulnerabilities on systems exposed online and discovered an intense activity between December 17th-20th.

“We record attacks using exploits for the vulnerabilities on one of our honeypots–a special server used by Doctor Web specialists as bait for fraudsters. The most active threat occurred between December 17th-20th, but attacks still continue.” reads the analysis published by DrWeb.

DayNumber of attacksDecember 107December 1120December 1225December 1315December 1432December 1521December 1624December 1747December 1851December 1933December 2032December 2114December 2235December 2336The attacks are carried out from 72 different IP addresses, most of them were German IP addresses (21%), followed by Russia (19.4%), the USA and China (9.7%).

Experts pointed out the difficulty in asses potentially vulnerable systems because some projects don’t have a direct dependence on Log4j.

“One way or another, vulnerabilities affect the performance of many projects worldwide. You need to closely watch the release of software updates that use the Log4j 2 library and install them as soon as possible.” concludes the experts.

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