#VU21102 Path traversal in CODESYS products - CVE-2019-13532

Vulnerability identifier: #VU21102

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-13532

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
CODESYS firmware
Server applications / SCADA systems
CODESYS Control for BeagleBone
Client/Desktop applications / Other client software
CODESYS Control for emPC-A/iMX6
Client/Desktop applications / Other client software
CODESYS Control for IOT2000
Client/Desktop applications / Other client software
CODESYS Control for Linux
Client/Desktop applications / Other client software
CODESYS Control for PFC100
Client/Desktop applications / Other client software
CODESYS Control for PFC200
Client/Desktop applications / Other client software
CODESYS Control for Raspberry Pi
Client/Desktop applications / Other client software
CODESYS Control RTE V3 (for Beckhoff CX)
Client/Desktop applications / Other client software
CODESYS Control RTE V3
Client/Desktop applications / Other client software
CODESYS Control Win V3 (part of the CODESYS Development System setup)
Client/Desktop applications / Other client software
CODESYS HMI V3
Client/Desktop applications / Other client software
CODESYS Control V3 Runtime System Toolkit
Client/Desktop applications / Other client software
CODESYS V3 Embedded Target Visu Toolkit
Client/Desktop applications / Other client software
CODESYS V3 Remote Target Visu Toolkit
Client/Desktop applications / Other client software

Vendor: CODESYS

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the CODESYS V3 web server. A remote attacker can send a specially crafted HTTP or HTTPS request and read arbitrary files outside the restricted working directory of the controller.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

CODESYS firmware: 1.1.9.18 - 3.5.14.40

CODESYS Control for BeagleBone: All versions

CODESYS Control for emPC-A/iMX6: All versions

CODESYS Control for IOT2000: All versions

CODESYS Control for Linux: All versions

CODESYS Control for PFC100: All versions

CODESYS Control for PFC200: All versions

CODESYS Control for Raspberry Pi: All versions

CODESYS Control RTE V3 (for Beckhoff CX): All versions

CODESYS Control RTE V3: All versions

CODESYS Control Win V3 (part of the CODESYS Development System setup): All versions

CODESYS HMI V3: All versions

CODESYS Control V3 Runtime System Toolkit: All versions

CODESYS V3 Embedded Target Visu Toolkit: All versions

CODESYS V3 Remote Target Visu Toolkit: All versions

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External links
https://ics-cert.us-cert.gov/advisories/icsa-19-255-01

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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.