2021-36762 | InterNiche NicheStack TFTP Packet tfshnd:tftpsrv.c out-of-bounds read

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.
5.1	$0-$5k	0.47

A vulnerability classified as problematic has been found in InterNiche NicheStack up to 4.3. This affects the function tfshnd:tftpsrv.c of the component TFTP Packet Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-125. This is going to have an impact on confidentiality. The summary by CVE is:

An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn’t ensure that a filename is adequately ‘’ terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no ‘’ byte exists within a reasonable range).

The weakness was shared 08/19/2021. It is possible to read the advisory at forescout.com. This vulnerability is uniquely identified as CVE-2021-36762 since 07/16/2021. 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 of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/21/2021).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Vendor

Name

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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🔍	🔍	🔍	🔍	🔍	🔍
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Information disclosure
CWE: CWE-125
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

07/16/2021 CVE assigned
08/19/2021 +34 days Advisory disclosed
08/19/2021 +0 days VulDB entry created
08/21/2021 +2 days VulDB last updateAdvisory: forescout.com
Status: Not defined

CVE: CVE-2021-36762 (🔒)

Created: 08/19/2021 16:42
Updated: 08/21/2021 16:43
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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