Vulnerability Details : CVE-2021-42840

Public exploit exists!
SuiteCRM before 7.11.19 allows remote code execution via the system settings Log File Name setting. In certain circumstances involving admin account takeover, logger_file_name can refer to an attacker-controlled PHP file under the web root, because only the all-lowercase PHP file extensions were blocked. NOTE: this issue exists because of an incomplete fix for CVE-2020-28328.
Published 2021-10-22 19:15:08
Updated 2021-11-30 20:27:45
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Execute code

Products affected by CVE-2021-42840

Exploit prediction scoring system (EPSS) score for CVE-2021-42840

EPSS FAQ
47.77%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 97 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2021-42840

  • SuiteCRM Log File Remote Code Execution
    Disclosure Date: 2021-04-28
    First seen: 2021-06-03
    exploit/linux/http/suitecrm_log_file_rce
    This module exploits an input validation error on the log file extension parameter. It does not properly validate upper/lower case characters. Once this occurs, the application log file will be treated as a php file. The log file can then be populated with php code by

CVSS scores for CVE-2021-42840

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
9.0
 HIGH AV:N/AC:L/Au:S/C:C/I:C/A:C
8.0
10.0
 NIST
8.8
 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
 NIST

CWE ids for CVE-2021-42840

References for CVE-2021-42840

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