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

Summaryinfo

A vulnerability labeled as critical has been found in WAGO PFC200 03.02.02(14). The affected element is the function sprintf of the component iocheckd Service. Such manipulation as part of Crafted Packet leads to os command injection. This vulnerability is uniquely identified as CVE-2019-5172. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in WAGO PFC200 03.02.02(14) and classified as critical. Affected by this issue is the function sprintf of the component iocheckd Service. The manipulation as part of a Crafted Packet leads to a os command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is 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 Firmware version 03.02.02(14). An attacker can send a specially crafted packet to trigger the parsing of this cache file. At 0x1e840 the extracted ntp value from the xml file is used as an argument to /etc/config-tools/config_sntp time-server-%d=<contents of ntp node> using sprintf(). This command is later executed via a call to system(). This is done in a loop and there is no limit to how many ntp entries will be parsed from the xml file.

The weakness was disclosed 03/11/2020. This vulnerability is handled as CVE-2019-5172 since 01/04/2019. The exploitation is known to be easy. Local access is required to approach this attack. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

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

The entries VDB-151326, VDB-151325, VDB-151324 and VDB-151323 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• WAGO

Name

• PFC200

Version

• 03.02.02(14)

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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