Synology Office 2.2.0-1502/2.2.1-1506 RTF Document Document.php command injection

Summaryinfo

A vulnerability described as critical has been identified in Synology Office 2.2.0-1502/2.2.1-1506. Affected by this vulnerability is an unknown functionality of the file Document.php of the component RTF Document Handler. Executing a manipulation can lead to command injection. This vulnerability is tracked as CVE-2017-11150. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Synology Office 2.2.0-1502/2.2.1-1506. This vulnerability affects an unknown code block of the file Document.php of the component RTF Document Handler. The manipulation with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Command injection vulnerability in Document.php in Synology Office 2.2.0-1502 and 2.2.1-1506 allows remote authenticated users to execute arbitrary commands via shell metacharacters in the crafted file name of RTF documents.

The bug was discovered 08/11/2017. The weakness was disclosed 08/14/2017 (Website). The advisory is shared for download at synology.com. This vulnerability was named CVE-2017-11150 since 07/10/2017. The attack can be initiated remotely. The requirement for exploitation is a single authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:Document.php it is possible to find vulnerable targets with Google Hacking.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Synology

Name

• Office

Version

• 2.2.0-1502
• 2.2.1-1506

License

• commercial

Website

• Vendor: https://www.synology.com/

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