10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
It’s been a long few days as organizations’ security teams have worked to map, quantify, and mitigate the immense risk presented by the Log4Shell vulnerability within Log4j. As can be imagined, cybercriminals are working overtime as well, as they seek out ways to exploit this vulnerability.
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The Rapid7 Threat Intelligence team is tracking the attacker’s-eye view and the related chatter on the clear, deep, and dark web within our Threat Intelligence platform. Here are 4 observations based on what we’ve seen at the onset of the identification of CVE-2021-44228.
Increased hacker chatter is a key indicator of an emerging threat that security teams must account for. Clearly the spike here is no surprise – however, it is important to monitor and understand the types and scope of the chatter in order to get a clear picture of what’s on the horizon.
The following two screenshots show that bad actors have already developed and shared proof of concepts exploiting the vulnerability in Log4j. They also show the extent to which this vulnerability impacts user communities such as PC gamers, social media users, Apple/iCloud customers, and more.
Log4Shell discussion on a Russian cybercrime forumLog4j discussion on a Turkish cybercrime forum
The underground cybercrime community functions like any other business model, but what sets it apart is the spirit with which bad actors share their work for mass consumption. The example above is completely open and free for anyone to access and utilize.
Scanners are the cybercriminal’s tool of choice for finding specific vulnerabilities in networks communicating via the internet. Using a scanner, any company — regardless of size — can be a target.
Log4j Scanner Discussion on RedditA fully automated, accurate, and extensive scanner for finding vulnerable Log4j hosts
The bottom line is that threat actors are showing great interest in Log4j within underground communities, and they are leveraging these communities to share information and experience regarding exploiting this vulnerability. That emphasizes the need to quickly patch this vulnerability, before multiple cybercriminals put their hands on an exploit and start to utilize it on a large scale.
Read more about the Log4Shell vulnerability within Log4j, and what your team can do in response.
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C