Lenovo X Server FFDC Service Log command injection

Summaryinfo

A vulnerability was found in Lenovo X Server. It has been classified as problematic. Affected is an unknown function of the component FFDC Service Log. The manipulation leads to command injection. This vulnerability is referenced as CVE-2017-3744. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Lenovo X Server (unknown version) and classified as problematic. This issue affects an unknown code block of the component FFDC Service Log. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality. The summary by CVE is:

In the IMM2 firmware of Lenovo System x servers, remote commands issued by LXCA or other utilities may be captured in the First Failure Data Capture (FFDC) service log if the service log is generated when that remote command is running. Captured command data may contain clear text login information. Authorized users that can capture and export FFDC service log data may have access to these remote commands.

The bug was discovered 06/08/2017. The weakness was published 06/20/2017 (Website). It is possible to read the advisory at support.lenovo.com. The identification of this vulnerability is CVE-2017-3744 since 12/16/2016. The exploitation is known to be easy. The attack may be initiated remotely. The requirement for exploitation is a simple authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 11 days. During that time the estimated underground price was around $0-$5k.

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

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Productinfo

Vendor

• Lenovo

Name

• X Server

License

• commercial

Website

• Vendor: https://www.lenovo.com/

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