Remote code execution in Opto22 PAC Control Basic and PAC Control Professional

1) Stack-based buffer overflow

EUVDB-ID: #VU14601

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-04154

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to stack-based buffer overflow when using a maliciously crafted PAC Control strategy. A remote unauthenticated attacker can edit an OptoScript block containing a string literal that is longer than 63 characters and has no spaces, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update to the latest versions.

Vulnerable software versions

PAC Control Professional: All versions

PAC Control Basic: All versions

External links

http://www.opto22.com/support/resources-tools/knowledgebase/kb87547

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.