Adobe has released out of band security updates to address a critical vulnerability affecting ColdFusion 2021, 2016, and 2018 releases.
Today’s emergency updates fix an arbitrary code execution security vulnerability caused by a Bad Input Validation software vulnerability.
Adobe has released ColdFusion 2016 Update 17, ColdFusion 2018 Update 11, and ColdFusion 2021 Update 1 to address the vulnerability and has stated that all previous versions prior to these fixes are vulnerable to attack.
Updates to the latest JDK are also required to secure servers
In today’s security bulletin, Adobe labeled the tracked vulnerability as CVE-2021-21087 with a “priority 2 rating,” assigned to vulnerabilities with no known exploits affecting products historically at high risk.
Adobe recommends that administrators install security updates as soon as possible and apply the security configuration settings described in the ColdFusion 2021, ColdFusion 2018, and ColdFusion 2016 locking guides.
“Adobe recommends updating your ColdFusion JDK / JRE to the latest version of LTS versions for 1.8 and JDK 11,” the company also said.
“Applying ColdFusion Update Without Corresponding JDK Update will NOT secure the server. “
More details on how to apply these updates can be found in the relevant technical notes linked in the integrated table below.
|Product||Vulnerable versions||Updated version||Platform||Availablity|
|ColdFusion 2016||Update 16 and earlier||Update 17||All||Technical note|
|ColdFusion 2018||Update 10 and earlier versions||Update 11||All||Technical note|
|ColdFusion 2021||Version 2021.0.0.323925||Update 1||All||Technical note|
The US National Security Agency (NSA) has listed CVE-2018-4939 (an Adobe ColdFusion 14 bug) as one of the top 25 vulnerabilities used by Chinese state sponsored or financially motivated hackers to exploit public servers .
For example, in November 2018, China-backed hackers took over ColdFusion servers by deploying China Chopper backdoors after exploiting a bug identified as CVE-2018-15961 and fixed two months earlier.
Chinese-language cybercrime group Rocke was also observed earlier that year as it dropped cryptomining malware on the internet by exploiting unpatched Adobe ColdFusion servers for similar bugs.
Another ColdFusion vulnerability, CVE-2018-15961, has been included by the NSA in the list of most exploited bugs for deploying web shells to vulnerable servers.