WAGO PFC200 03.02.02(14) iocheckd Service sprintf Crafted Packet os command injection

Summaryinfo

A vulnerability described as critical has been identified in WAGO PFC200 03.02.02(14). This affects the function sprintf of the component iocheckd Service. Executing a manipulation as part of Crafted Packet can lead to os command injection. The identification of this vulnerability is CVE-2019-5174. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability was found in WAGO PFC200 03.02.02(14). It has been declared as critical. This vulnerability affects the function sprintf of the component iocheckd Service. The manipulation as part of a Crafted Packet leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An exploitable command injection vulnerability exists in the iocheckd service &acirc;&euro;&tilde;I/O-Check&acirc;&euro;&trade; function of the WAGO PFC 200 version 03.02.02(14). A specially crafted XML cache file written to a specific location on the device can be used to inject OS commands. An attacker can send a specially crafted packet to trigger the parsing of this cache file.At 0x1e9fc the extracted subnetmask value from the xml file is used as an argument to /etc/config-tools/config_interfaces interface=X1 state=enabled subnet-mask=<contents of subnetmask node> using sprintf(). This command is later executed via a call to system().

The weakness was shared 03/11/2020. This vulnerability was named CVE-2019-5174 since 01/04/2019. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-151328, VDB-151327, VDB-151326 and VDB-151325 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• WAGO

Name

• PFC200

Version

• 03.02.02(14)

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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