Overly permissive cross-domain whitelist in HMS Networks Ewon Flexy and Cosy
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-16230 |
| CWE-ID | CWE-942 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
eWON Flexy Hardware solutions / Routers & switches, VoIP, GSM, etc eWON Cosy Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | HMS Networks |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Overly permissive cross-domain whitelist
EUVDB-ID: #VU46657
Risk: Low
CVSSv3.1: 2 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-16230
CWE-ID:
CWE-942 - Overly Permissive Cross-domain Whitelist
Exploit availability: No
DescriptionThe vulnerability allows a local user to bypass the CORS protection mechanism.
The vulnerability exists due to incorrect processing of the "Origin" HTTP header that is supplied within HTTP request. A local administrator can supply arbitrary value via the "Origin" HTTP header, bypass implemented CORS protection mechanism and retrieve limited confidential information through sniffing.
MitigationInstall updates from vendor's website.
Vulnerable software versionseWON Flexy: before 14.1
eWON Cosy: before 14.1
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-20-254-03
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.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
