Authentication bypass in Telecrane F25 Series

1) Authentication bypass

EUVDB-ID: #VU15511

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-17935

CWE-ID: CWE-294 - Authentication Bypass by Capture-replay

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to bypass authentication on the target system.

The vulnerability exists due to use of fixed codes that are reproducible by sniffing and re-transmission. A remote unauthenticated attacker can bypass authentication to replay commands, spoof arbitrary message, or keep the controlled load in a permanent “stop” state.

Mitigation

Update to version 00.0A.

Vulnerable software versions

F25 Series: before 00.0A

External links

http://ics-cert.us-cert.gov/advisories/ICSA-18-296-03

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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