VDB-97851 · CVE-2017-6444 · EDB 41601

MikroTik Router hAP Lite 6.25 TCP ACK resource management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in MikroTik Router hAP Lite 6.25. It has been classified as critical. The affected element is an unknown function of the component TCP ACK Handler. Performing a manipulation results in resource management. This vulnerability is identified as CVE-2017-6444. The attack can be initiated remotely. Additionally, an exploit exists. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability, which was classified as critical, was found in MikroTik Router hAP Lite 6.25 (Router Operating System). This affects an unknown code block of the component TCP ACK Handler. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. The summary by CVE is:

The MikroTik Router hAP Lite 6.25 has no protection mechanism for unsolicited TCP ACK packets in the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many ACK packets. After the attacker stops the exploit, the CPU usage is 100% and the router requires a reboot for normal operation.

The bug was discovered 08/09/2018. The weakness was released 03/12/2017 (Website). It is possible to read the advisory at exploitalert.com. This vulnerability is uniquely identified as CVE-2017-6444 since 03/03/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

It is possible to mitigate the weakness by firewalling .

The vulnerability is also documented in the vulnerability database at Exploit-DB (41601). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Router Operating System

Vendor

MikroTik

Name

Router hAP Lite

Version

6.25

License

commercial

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/03/2017 🔍
03/12/2017 +9 days 🔍
03/12/2017 +0 days 🔍
03/12/2017 +0 days 🔍
08/09/2018 +515 days 🔍
06/15/2024 +2137 days 🔍

Sourcesinfo

Advisory: exploitalert.com
Status: Not defined

CVE: CVE-2017-6444 (🔍)
GCVE (CVE): GCVE-0-2017-6444
GCVE (VulDB): GCVE-100-97851
OSVDB: - CVE-2017-6444 - MikroTik - hAP Lite - Denial of Service Issue

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

Entryinfo

Created: 03/12/2017 08:33
Updated: 06/15/2024 12:19
Changes: 03/12/2017 08:33 (58), 09/06/2020 08:32 (6), 06/15/2024 12:19 (17)
Complete: 🔍
Cache ID: 216::103

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