A vulnerability was found in Cambium ePMP up to 3.5. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component Web Administration Console. The manipulation with an unknown input leads to a cross site scripting vulnerability (Persistent). The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

In version 3.5 and prior of Cambium Networks ePMP firmware, all authenticated users have the ability to update the Device Name and System Description fields in the web administration console, and those fields are vulnerable to persistent cross-site scripting (XSS) injection.

The bug was discovered 12/19/2017. The weakness was released 12/20/2017 (Website). The advisory is shared at blog.rapid7.com. This vulnerability is known as CVE-2017-5256 since 01/09/2017. The attack can be launched remotely. The requirement for exploitation is a single authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

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 $0-$5k.

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

Entries connected to this vulnerability are available at 110939, 110940, 110942 and 110943.

Productinfo

Vendor

• Cambium

Name

• ePMP

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5

CPE 2.3info

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CPE 2.2info

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