#VU13420 Improper input validation in Rockwell Automation products - CVE-2017-9312

Vulnerability identifier: #VU13420

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-9312

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Allen-Bradley Armor Compact GuardLogix 5370
Hardware solutions / Firmware
Allen-Bradley Compact GuardLogix 5370
Hardware solutions / Firmware
Allen-Bradley Armor CompactLogix 5370 L3
Hardware solutions / Firmware
Allen-Bradley CompactLogix 5370 L3
Hardware solutions / Firmware
Allen-Bradley CompactLogix 5370 L2
Hardware solutions / Firmware
Allen-Bradley CompactLogix 5370 L1
Hardware solutions / Firmware

Vendor: Rockwell Automation

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to an error when processing malicious input. A remote attacker can send a specific TCP packet to the product and cause a Major Non-Recoverable Fault (MNRF) and service crash.

Mitigation
Update to version 31.011.

Vulnerable software versions

Allen-Bradley Armor Compact GuardLogix 5370: before 31.011

Allen-Bradley Compact GuardLogix 5370: before 31.011

Allen-Bradley Armor CompactLogix 5370 L3: before 31.011

Allen-Bradley CompactLogix 5370 L3: before 31.011

Allen-Bradley CompactLogix 5370 L2: before 31.011

Allen-Bradley CompactLogix 5370 L1: before 31.011

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External links
https://ics-cert.us-cert.gov/advisories/ICSA-18-172-02

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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.