OS Command Injection in KLog Server - CVE-2020-35729
Published: December 27, 2020 / Updated: May 9, 2021
Vulnerability identifier: #VU50169
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-35729
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation in the "user" parameter in actions/authenticate.php. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
KLog Server
How to mitigate CVE-2020-35729
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Links to Public Exploits and PoC-codes
External References
- http://packetstormsecurity.com/files/160798/Klog-Server-2.4.1-Command-Injection.html
- http://packetstormsecurity.com/files/161123/Klog-Server-2.4.1-Command-Injection.html
- https://github.com/mustgundogdu/Research/blob/main/KLOG_SERVER/Exploit_Code
- https://github.com/mustgundogdu/Research/blob/main/KLOG_SERVER/README.md