Session Fixation in FL NAT SMCS 8TX



Published: 2019-03-26 | Updated: 2019-06-13
Risk High
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2019-9744
CWE-ID CWE-384
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		FL NAT SMCS 8TX
Hardware solutions / Routers & switches, VoIP, GSM, etc

FL NAT SMN 8TX
Hardware solutions / Routers & switches, VoIP, GSM, etc

FL NAT SMN 8TX-M-DMG
Hardware solutions / Routers & switches, VoIP, GSM, etc

FL NAT SMN 8TX-M
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Phoenix Contact GmbH

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Session Fixation

EUVDB-ID: #VU18691

Risk: High

CVSSv3.1: 8.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2019-9744

CWE-ID: CWE-384 - Session Fixation

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to the web interface.

The vulnerability exists due to improper access restrictions when attackers arriving from the same source IP address as an authenticated user, because this IP address is used as a session identifier. A remote unauthorized attacker can get access to the web interface, which may allow full access to the device configuration.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Phoenix Contact recommends to:
  • operate the devices in closed networks or protected with a suitable firewall
  • Log off from the WEB-UI immediately after administration.
  • Disable the WEB-UI and use configuration access via SNMP instead.
    • Ensure the system password is strong as this is also the SNMP write community.

Vulnerable software versions

FL NAT SMCS 8TX: All versions

FL NAT SMN 8TX: All versions

FL NAT SMN 8TX-M-DMG: All versions

FL NAT SMN 8TX-M: All versions

External links

http://www.securityfocus.com/bid/108576
http://cert.vde.com/de-de/advisories/vde-2019-006


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 device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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