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

Summaryinfo

A vulnerability marked as critical has been reported in WAGO PFC200 03.02.02(14). The impacted element is the function sprintf of the component iocheckd Service. Performing a manipulation as part of Crafted Packet results in os command injection. This vulnerability was named CVE-2019-5173. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability was found in WAGO PFC200 03.02.02(14). It has been classified as critical. This affects the function sprintf of the component iocheckd Service. The manipulation as part of a Crafted Packet leads to a os command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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 Firmware 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 state value from the xml file is used as an argument to /etc/config-tools/config_interfaces interface=X1 state=<contents of state node> using sprintf(). This command is later executed via a call to system().

The weakness was presented 03/11/2020. This vulnerability is uniquely identified as CVE-2019-5173 since 01/04/2019. The exploitability is told to be easy. Attacking locally is a requirement. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

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

See VDB-151327, VDB-151326, VDB-151325 and VDB-151324 for similar entries. Statistical analysis made it clear that VulDB provides the best quality 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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