MikroTik RouterOS up to 6.43.12 Interfaces path traversal

Summaryinfo

A vulnerability labeled as critical has been found in MikroTik RouterOS up to 6.43.12. Affected by this issue is some unknown functionality of the component Interfaces. The manipulation results in path traversal. This vulnerability is reported as CVE-2019-3943. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in MikroTik RouterOS up to 6.43.12 (Router Operating System). It has been classified as critical. Affected is an unknown part of the component Interfaces. 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 confidentiality, integrity, and availability. CVE summarizes:

MikroTik RouterOS versions Stable 6.43.12 and below, Long-term 6.42.12 and below, and Testing 6.44beta75 and below are vulnerable to an authenticated, remote directory traversal via the HTTP or Winbox interfaces. An authenticated, remote attack can use this vulnerability to read and write files outside of the sandbox directory (/rw/disk).

The bug was discovered 04/08/2019. The weakness was disclosed 04/10/2019. This vulnerability is traded as CVE-2019-3943 since 01/03/2019. It is possible to launch the attack remotely. A authentication is necessary for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

The vulnerability was handled as a non-public zero-day exploit for at least 2 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• MikroTik

Name

• RouterOS

Version

• 6.43.0
• 6.43.1
• 6.43.2
• 6.43.3
• 6.43.4
• 6.43.5
• 6.43.6
• 6.43.7
• 6.43.8
• 6.43.9
• 6.43.10
• 6.43.11
• 6.43.12

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion