VDB-174188 · CVE-2021-3512 · GCVE-0-2021-3512

Buffalo BHR-4GRV Telnet Service access control

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.
9.6	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Buffalo BHR-4GRV, DWR-HP-G300NH, HW-450HP-ZWE, WHR-300HP, WHR-300, WHR-G301N, WHR-HP-G300N, WHR-HP-GN, WPL-05G300, WZR-450HP-CWT, WZR-450HP-UB, WZR-HP-AG300H, WZR-HP-G300NH, WZR-HP-G301NH, WZR-HP-G302H, WZR-HP-G450H, WZR-300HP, WZR-450HP, WZR-600DHP, WZR-D1100H, FS-HP-G300N, FS-600DHP and FS-R600DHP. This vulnerability affects unknown code of the component Telnet Service. Such manipulation leads to access control. This vulnerability is listed as CVE-2021-3512. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Buffalo BHR-4GRV, DWR-HP-G300NH, HW-450HP-ZWE, WHR-300HP, WHR-300, WHR-G301N, WHR-HP-G300N, WHR-HP-GN, WPL-05G300, WZR-450HP-CWT, WZR-450HP-UB, WZR-HP-AG300H, WZR-HP-G300NH, WZR-HP-G301NH, WZR-HP-G302H, WZR-HP-G450H, WZR-300HP, WZR-450HP, WZR-600DHP, WZR-D1100H, FS-HP-G300N, FS-600DHP and FS-R600DHP. Affected by this issue is an unknown function of the component Telnet Service. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability.

The weakness was presented 04/28/2021. The advisory is shared for download at jvn.jp. This vulnerability is handled as CVE-2021-3512. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/06/2021). The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Buffalo

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/22/2021 🔍
04/28/2021 +6 days 🔍
04/28/2021 +0 days 🔍
05/06/2021 +8 days 🔍

Sourcesinfo

Advisory: jvn.jp
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-3512 (🔍)
GCVE (CVE): GCVE-0-2021-3512
GCVE (VulDB): GCVE-100-174188

Entryinfo

Created: 04/28/2021 12:11
Updated: 05/06/2021 15:05
Changes: 04/28/2021 12:11 (37), 05/02/2021 13:47 (5), 05/06/2021 15:05 (1)
Complete: 🔍
Committer: xakemiy248
Cache ID: 216::103