SB2018032802 - Multiple vulnerabilities in Schneider Electric firmware
Published: March 28, 2018
Security Bulletin ID
SB2018032802
CSH Severity
High
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2018-7240)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.
The weakness exists due to the FTP server does not limit the length of a command parameter. A remote attacker can supply specially crafted parameters, trigger stack-based buffer overflow and execute arbitrary code with elevated privileges.
2) Use of hard-coded credentials (CVE-ID: CVE-2018-7241)
CWE-ID: CWE-798 - Use of Hard-coded Credentials
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.
The weakness exists due to the FTP servers contain a hard-coded account. A remote attacker can bypass security restrictions and gain unauthorized access to the system.
3) Buffer overflow (CVE-ID: CVE-2018-7242)
CWE-ID: CWE-120 - Buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.
The weakness exists due to the FTP server does not limit the length of a command parameter. A remote attacker can supply specially crafted parameters, trigger buffer overflow and cause the service to crash.
Remediation
Install update from vendor's website.