A vulnerability, which was classified as problematic, was found in MikroTik RouterOS up to 6.40.8/6.42.6 (Router Operating System). This affects an unknown functionality of the component HTTP Server. The manipulation as part of a HTTP POST Request leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to a memory exhaustion vulnerability. An authenticated remote attacker can crash the HTTP server and in some circumstances reboot the system via a crafted HTTP POST request.

The bug was discovered 08/22/2018. The weakness was shared 08/23/2018 (Website). It is possible to read the advisory at mikrotik.com. This vulnerability is uniquely identified as CVE-2018-1157 since 12/04/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 112114 (MikroTik RouterOS < 6.40.9 / 6.42.7 / 6.43 multiple vulnerabilities.), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13255 (MikroTik RouterOS Multiple Vulnerabilities).

Upgrading to version 6.40.9 or 6.42.7 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (112114). The entries 123158, 123160 and 123161 are related to this item.

Productinfo

Type

• Router Operating System

Vendor

• MikroTik

Name

• RouterOS

Version

• 6.40.0
• 6.40.1
• 6.40.2
• 6.40.3
• 6.40.4
• 6.40.5
• 6.40.6
• 6.40.7
• 6.40.8
• 6.42.0
• 6.42.1
• 6.42.2
• 6.42.3
• 6.42.4
• 6.42.5
• 6.42.6

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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