#VU18691 Session Fixation in Phoenix Contact GmbH products - CVE-2019-9744


| Updated: 2019-06-13

Vulnerability identifier: #VU18691

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-2019-9744

CWE-ID: CWE-384

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
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

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: before -

FL NAT SMN 8TX: before -

FL NAT SMN 8TX-M-DMG: before -

FL NAT SMN 8TX-M: before -

External links
https://www.securityfocus.com/bid/108576
https://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.

Is there known malware, which exploits this vulnerability?

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


Latest bulletins with this vulnerability


Session Fixation in FL NAT SMCS 8TX