#VU57665 Heap-based buffer overflow in V-Server Lite and Tellus Lite V-Simulator - CVE-2021-38415

Vulnerability identifier: #VU57665

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-38415

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
V-Server Lite
Server applications / Web servers
Tellus Lite V-Simulator
Server applications / Other server solutions

Vendor: Fuji Electric

Description

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

The vulnerability exists due to a boundary error within the parsing of V8 files within the V-Simulator module. A remote attacker can trigger heap-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

V-Server Lite: before 4.0.12.0

Tellus Lite V-Simulator: before 4.0.12.0

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External links
https://ics-cert.us-cert.gov/advisories/icsa-21-299-01
https://www.zerodayinitiative.com/advisories/ZDI-21-1265/

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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.