2020-35684 | InterNiche NicheStack IP Header 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	1.17

A vulnerability was found in InterNiche NicheStack 3.0. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component IP Header Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-125. As an impact it is known to affect confidentiality. The summary by CVE is:

An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value of the IP payload size (extracted from the IP header) to compute the length of the TCP payload within the TCP checksum computation function. When the IP payload size is set to be smaller than the size of the IP header, the TCP checksum computation function may read out of bounds (a low-impact write-out-of-bounds is also possible).

The weakness was disclosed 08/19/2021. The advisory is shared at forescout.com. This vulnerability is known as CVE-2020-35684 since 12/24/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn’t need any form of authentication. Neither technical details nor an exploit are publicly available. The price 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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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
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Threat Intelligenceinfoedit

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

0-Day Time: 🔒

12/24/2020 CVE assigned
08/19/2021 +237 days Advisory disclosed
08/19/2021 +0 days VulDB entry created
08/21/2021 +2 days VulDB last updateAdvisory: forescout.com
Status: Not defined
Confirmation: 🔒

CVE: CVE-2020-35684 (🔒)

Created: 08/19/2021 16:40
Updated: 08/21/2021 16:28
Changes: (3) source_cve_assigned source_cve_nvd_summary advisory_confirm_url
Complete: 🔍

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