MikroTik RouterOS prior 6.42.12 (long-term)/6.43.12 (stable) Network Request confused deputy

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in MikroTik RouterOS. It has been classified as critical. Impacted is an unknown function. This manipulation as part of Network Request causes confused deputy. The identification of this vulnerability is CVE-2019-3924. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in MikroTik RouterOS (Router Operating System). Affected by this vulnerability is an unknown code block. The manipulation as part of a Network Request leads to a confused deputy vulnerability. The CWE definition for the vulnerability is CWE-441. The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

MikroTik RouterOS before 6.43.12 (stable) and 6.42.12 (long-term) is vulnerable to an intermediary vulnerability. The software will execute user defined network requests to both WAN and LAN clients. A remote unauthenticated attacker can use this vulnerability to bypass the router's firewall or for general network scanning activities.

The bug was discovered 02/21/2019. The weakness was shared 02/20/2019 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2019-3924 since 01/03/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 6.42.12 (long-term) or 6.43.12 (stable) eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Confused deputy
CWE: CWE-441
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: RouterOS 6.42.12 (long-term)/6.43.12 (stable)

Timelineinfo

01/03/2019 🔍
02/20/2019 +48 days 🔍
02/21/2019 +1 days 🔍
02/21/2019 +0 days 🔍
08/15/2025 +2367 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed

CVE: CVE-2019-3924 (🔍)
GCVE (CVE): GCVE-0-2019-3924
GCVE (VulDB): GCVE-100-131059
SecurityFocus: 107177

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/21/2019 08:08
Updated: 08/15/2025 22:33
Changes: 02/21/2019 08:08 (55), 05/11/2020 17:32 (2), 07/11/2023 16:17 (5), 08/07/2024 15:46 (22), 08/15/2025 22:33 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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