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
0.976 High
EPSS
Percentile
100.0%
Summary:
CVE-2021-44228, also named Log4Shell or LogJam, is a Remote Code Execution (RCE) class vulnerability. If attackers manage to exploit it on one of the servers, they gain the ability to execute arbitrary code and potentially take full control of the system.
What makes CVE-2021-44228 especially dangerous is the ease of exploitation: even an inexperienced hacker can successfully execute an attack using this vulnerability. According to the researchers, attackers only need to force the application to write just one string to the log, and after that they are able to upload their own code into the application due to the message lookup substitution function.
Supporting Material/References:
Picture and Logs was Uploaded as a proof.
Remediation:
Update the log4j jar to 2.15 or 2.16
Successful attack leads Arbitary Code Execution on the application
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
0.976 High
EPSS
Percentile
100.0%