Critical Atlassian 0-day is under active exploit. You’re patched, right?
About this time final week, risk actors started quietly tapping a beforehand unknown vulnerability in Atlassian software program that gave them virtually full management over a small variety of servers. Since Thursday, lively exploits of the vulnerability have mushroomed, making a semi-organized frenzy amongst competing crime teams.
“It’s clear that a number of risk teams and particular person actors have the exploit and have been utilizing it in numerous methods,” stated Steven Adair, president of Volexity, the safety agency that discovered the zero-day vulnerability whereas responding to a buyer’s breach over the Memorial Day weekend. “Some are fairly sloppy and others are a bit extra stealth.” His tweet got here a day after his agency launched the report detailing the vulnerability.
It’s clear that a number of risk teams and particular person actors have the exploit and have been utilizing it in numerous methods. Some are fairly sloppy and others are a bit extra stealth. Loading class information into reminiscence and writing JSP shells are the preferred we have now seen to this point.
— Steven Adair (@stevenadair) June 3, 2022
Adair additionally stated that the business verticals being hit “are fairly widespread. This can be a free-for-all the place the exploitation appears coordinated.”
CVE-2022-26134, because the vulnerability is tracked, permits for unauthenticated distant code execution on servers working all supported variations of Confluence Server and Confluence Information Middle. In its advisory, Volexity referred to as the vulnerability “harmful and trivially exploited.” The vulnerability is probably going additionally current in unsupported and long-term help variations, safety agency Rapid7 said.
Volexity researchers wrote:
When initially analyzing the exploit, Volexity famous it seemed much like earlier vulnerabilities which have additionally been exploited with the intention to acquire distant code execution. These kinds of vulnerabilities are harmful, as attackers can execute instructions and acquire full management of a susceptible system with out credentials so long as net requests will be made to the Confluence Server system. It also needs to be famous that CVE-2022-26134 seems to be one other command injection vulnerability. This sort of vulnerability is extreme and calls for vital consideration.
Risk actors are exploiting the vulnerability to put in the Chopper webshell and certain different varieties of malware. This is hoping susceptible organizations have already patched or in any other case addressed this gap and, if not, wishing them good luck this weekend. Atlassian’s advisory is here.