Remote code execution in AVEVA Wonderware License Server

1) Buffer overflow

EUVDB-ID: #VU12590

Risk: High

CVSSv4.0: 8.9 [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/E:P/U:Amber]

CVE-ID: CVE-2015-8277

CWE-ID: N/A

Exploit availability: Yes

Description

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

The weakness exists in the custom string copying function of the license server manager due to improper bounds checking on incoming data. A remote attacker can send specially crafted packet with opcode (a) 0x107 or (b) 0x10a, trigger memory corruption and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Wonderware License Server: All versions

CPE2.3

• cpe:2.3:a:aveva_software:wonderware_license_server:*:*:*:*:*:*:*:*

External links

https://sw.aveva.com/hubfs/assets-2018/pdf/security-bulletin/SecurityBulletin_LFSec129.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.