Cisco Small Business SA520/Small Business SA540 2.1.71/2.2.0.7 scgi-bin/platform.cgi thispage path traversal

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco Small Business SA520 and Small Business SA540 2.1.71/2.2.0.7. This impacts an unknown function of the file scgi-bin/platform.cgi. Performing a manipulation of the argument thispage with the input ../ results in path traversal. This vulnerability is cataloged as CVE-2017-15805. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco Small Business SA520 and Small Business SA540 2.1.71/2.2.0.7. This affects some unknown functionality of the file scgi-bin/platform.cgi. The manipulation of the argument thispage with the input value ../ leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

Cisco Small Business SA520 and SA540 devices with firmware 2.1.71 and 2.2.0.7 allow ../ directory traversal in scgi-bin/platform.cgi via the thispage parameter, for reading arbitrary files.

The bug was discovered 10/10/2018. The weakness was shared 10/23/2017 (Website). It is possible to read the advisory at fwhibbit.es. This vulnerability is uniquely identified as CVE-2017-15805 since 10/23/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/30/2019). The attack technique deployed by this issue is T1006 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.

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Productinfo

Vendor

• Cisco

Name

• Small Business SA520
• Small Business SA540

Version

• 2.1.71
• 2.2.0.7

License

• commercial

Website

• Vendor: https://www.cisco.com/

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