Backdoor accounts in WAGO Industrial Managed Switches

Published: 2019-06-13 | Updated: 2019-06-14
Severity Medium
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-12550
CVE-2019-12549
CWE ID CWE-798
Exploitation vector Local network
Public exploit N/A
Vulnerable software WAGO Industrial Managed Switch 852-1505 Subscribe
WAGO Industrial Managed Switch 852-1305
WAGO Industrial Managed Switch 852-303
Vendor WAGO

Security Advisory

1) Use of hard-coded credentials

Severity: Medium

CVSSv3: 7.7 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-12550

CWE-ID: CWE-798 - Use of Hard-coded Credentials

Description

The vulnerability allows a remote attacker to gain full access to vulnerable system.

The vulnerability exists due to presence of hard-coded credentials in application code. A remote unauthenticated attacker can access the affected device using the hard-coded credentials.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WAGO Industrial Managed Switch 852-1505: -

WAGO Industrial Managed Switch 852-1305: -

WAGO Industrial Managed Switch 852-303: -

CPE External links

https://ics-cert.us-cert.gov/advisories/ICSA-19-164-02

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).

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.

2) Use of hard-coded credentials

Severity: Medium

CVSSv3: 7.7 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-12549

CWE-ID: CWE-798 - Use of Hard-coded Credentials

Description

The vulnerability allows a remote attacker to gain full access to vulnerable system.

The vulnerability exists due to presence of hard-coded SSH key that cannot be regenerated. A remote unauthenticated attacker with access to the key can compromise the affected device.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

WAGO Industrial Managed Switch 852-1505: -

WAGO Industrial Managed Switch 852-1305: -

WAGO Industrial Managed Switch 852-303: -

CPE External links

https://ics-cert.us-cert.gov/advisories/ICSA-19-164-02

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).

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.