A vulnerability has been found in VyOS 1.1.8 (Router Operating System) and classified as critical. Affected by this vulnerability is some unknown processing of the component Sandbox. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A sandbox escape issue was discovered in VyOS 1.1.8. It provides a restricted management shell for operator users to administer the device. By issuing various shell special characters with certain commands, an authenticated operator user can break out of the management shell and gain access to the underlying Linux shell. The user can then run arbitrary operating system commands with the privileges afforded by their account.

The bug was discovered 11/01/2018. The weakness was shared 12/17/2018 (Website). The advisory is shared at blog.vyos.io. This vulnerability is known as CVE-2018-18555 since 10/22/2018. The exploitation appears to be easy. The attack can be launched remotely. Required for exploitation is a single authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 46 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.

The entry 128030 is related to this item.

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Type

• Router Operating System

Name

• VyOS

Version

• 1.1.8

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• 🔍

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• 🔍

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