Cisco FXOS/Firepower 4100/Firepower 9300 Web-based User Interface path traversal

Summaryinfo

A vulnerability labeled as critical has been found in Cisco FXOS, Firepower 4100 and Firepower 9300. This impacts an unknown function of the component Web-based User Interface. The manipulation results in path traversal. This vulnerability is identified as CVE-2018-0300. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco FXOS, Firepower 4100 and Firepower 9300 (Firewall Software) (the affected version unknown). Affected is an unknown part of the component Web-based User Interface. The manipulation with an unknown input 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 integrity, and availability. CVE summarizes:

A vulnerability in the process of uploading new application images to Cisco FXOS on the Cisco Firepower 4100 Series Next-Generation Firewall (NGFW) and Firepower 9300 Security Appliance could allow an authenticated, remote attacker using path traversal techniques to create or overwrite arbitrary files on an affected device. The vulnerability is due to insufficient validation during the application image upload process. An attacker could exploit this vulnerability by creating an application image containing malicious code and installing the image on the affected device using the CLI or web-based user interface (web UI). These actions occur prior to signature verification and could allow the attacker to create and execute arbitrary code with root privileges. Note: A missing or invalid signature in the application image will cause the upload process to fail, but does not prevent the exploit. Cisco Bug IDs: CSCvc21901.

The bug was discovered 06/20/2018. The weakness was released 06/21/2018 as cisco-sa-20180620-firepwr-pt as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2018-0300 since 11/27/2017. It is possible to launch the attack remotely. A authentication is necessary for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 03/28/2023). This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

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

Type

• Firewall Software

Vendor

• Cisco

Name

• Firepower 4100
• Firepower 9300
• FXOS

License

• commercial

Website

• Vendor: https://www.cisco.com/

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