SolarWinds SFTP SCP Server up to 2018-09-10 Configuration File xml external entity reference

Summaryinfo

A vulnerability was found in SolarWinds SFTP SCP Server up to 2018-09-10. It has been classified as critical. This affects an unknown function of the component Configuration File Handler. This manipulation causes xml external entity reference. This vulnerability is handled as CVE-2018-16792. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in SolarWinds SFTP SCP Server up to 2018-09-10. Affected by this vulnerability is an unknown code block of the component Configuration File Handler. The manipulation with an unknown input leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

SolarWinds SFTP/SCP server through 2018-09-10 is vulnerable to XXE via a world readable and writable configuration file that allows an attacker to exfiltrate data.

The bug was discovered 12/01/2018. The weakness was released 12/05/2018 as not defined mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2018-16792 since 09/10/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 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.

Entry connected to this vulnerability is available at VDB-127530. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• SolarWinds

Name

• SFTP SCP Server

Version

• 2018-09-10

License

• commercial

Website

• Vendor: https://www.solarwinds.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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