Buffer overflow in Schneider Electric Modicon Controllers
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-7838 |
| CWE-ID | CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Modicon BMENOC0301 Hardware solutions / Firmware Modicon M580 Hardware solutions / Firmware |
| Vendor | Schneider Electric |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Buffer overflow
EUVDB-ID: #VU21514
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-7838
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause a denial of service (DoS) on the target system.
The vulnerability exists due to a boundary error on the FTP service of the controller or the Ethernet BMENOC module when it receives a FTP CWD command with a data length greater than 1020 bytes. A power cycle is then needed to reactivate the FTP service. A remote attacker can trigger memory corruption and cause a denial of service.
Install updates from vendor's website.
Vulnerable software versionsModicon BMENOC0301: 1.03 - 2.14
Modicon M580: 1.04 - 2.80
External linkshttp://www.schneider-electric.com/ww/en/download/document/SEVD-2019-190-03
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
