Insecure DLL loading in Fazecast jSerialComm library and Schneider Electric EcoStruxure IT Gateway



Published: 2020-05-06 | Updated: 2020-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-10626
CWE-ID CWE-427
Exploitation vector Local
Public exploit N/A
Vulnerable software
Subscribe 		jSerialComm
Web applications / JS libraries

EcoStruxure IT Gateway
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Fazecast
Schneider Electric

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated: 11.05.2020

Updated vulnerability description, changed attack vector and lowered bulletin severity.

1) Insecure DLL loading

EUVDB-ID: #VU27554

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10626

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A local user can place a specially crafted .dll file into a temporary directory on the system and execute arbitrary code with SYSTEM privileges.

Note: This vulnerability affects the following EcoStruxure IT Gateway versions:
  • Versions 1.5.x, 1.6.x, 1.7.x

Mitigation

Install updates from vendor's website.

Vulnerable software versions

jSerialComm: 2.0.2 - 2.2.2

EcoStruxure IT Gateway: before 1.8.1

External links

http://ics-cert.us-cert.gov/advisories/ICSA2012601
http://www.zerodayinitiative.com/advisories/ZDI-20-588/


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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