Log4j, Log4j, Log4j. Let’s see you say that 10 times fast. If you can’t, then you may need to learn because Log4j is on the tips of everyone’s tongues right now. In fact, people are calling Log4j the biggest security breach since Tutar, Borat’s movie daughter, sneaked into The White House and had a lively face-to-face conversation with President Trump.
Log4j, Log4j, Log4j. Let’s see you say that 10 times fast. If you can’t, then you may need to learn because Log4j is on the tips of everyone’s tongues right now. In fact, people are calling Log4j the biggest security breach since Tutar, Borat’s movie daughter, sneaked into The White House and had a lively face-to-face conversation with President Trump.
Overnight, it was disclosed by Apache that Log4j version 2.16 is also vulnerable by way of a Denial of Service attack with the impact being a full application crash, the severity for this is classified as High (7.5). Snyk is currently not aware of any fully-fledged PoCs or exploits in circulation. CVE-2021-45105 has been issued, and a new fixed version (2.17) has been published by Apache which we recommend upgrading to.
We have published an initial blog on the Log4j exploit and a followup blog with a second detection method for detecting the first stage of exploits occurring over LDAP. Today, we will discuss a third detection method, this one focused on the second-stage download that happens after the first stage completes. In this case, the JVM will download additional Java code payloads over HTTP.
Last week, a researcher from the Alibaba Cloud Security Team dropped a zero-day remote code execution exploit on Twitter, targeting the extremely popular log4j logging framework for Java (specifically, the 2.x branch called Log4j2). The vulnerability was originally discovered and reported to Apache by the Alibaba cloud security team on November 24th. MITRE assigned CVE-2021-44228 to this vulnerability, which has since been dubbed Log4Shell by security researchers.
Since 2019, Snyk and Dynatrace have partnered with a shared mission of securing the entire software development lifecycle (SDLC) and accelerating digital transformation. As many agile organizations migrate their workloads to the cloud, it’s tempting for teams to let security take a back-seat until all the pieces of the infrastructure puzzle are in place.
