VDB-185083 · CVE-2021-3454 · GHSA-fx88-6c29-vrp3

Zephyr 2.4.0/2.50 L2CAP K-Frame assertion

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.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Zephyr 2.4.0/2.50 and classified as problematic. This affects an unknown function of the component L2CAP K-Frame Handler. This manipulation causes assertion. This vulnerability appears as CVE-2021-3454. The attacker needs to be present on the local network. There is no available exploit.

Detailsinfo

A vulnerability was found in Zephyr 2.4.0/2.50. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component L2CAP K-Frame Handler. The manipulation with an unknown input leads to a assertion vulnerability. The CWE definition for the vulnerability is CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. As an impact it is known to affect availability.

The weakness was presented 10/20/2021 as GHSA-fx88-6c29-vrp3. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2021-3454 since 03/19/2021. The technical details are unknown and an exploit is not publicly available.

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

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

Productinfo

Name

Zephyr

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (Zephyr Project): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

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: Assertion
CWE: CWE-617
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/19/2021 🔍
10/20/2021 +214 days 🔍
10/20/2021 +0 days 🔍
10/27/2021 +7 days 🔍

Sourcesinfo

Advisory: GHSA-fx88-6c29-vrp3
Status: Confirmed

CVE: CVE-2021-3454 (🔍)
GCVE (CVE): GCVE-0-2021-3454
GCVE (VulDB): GCVE-100-185083

Entryinfo

Created: 10/20/2021 09:59
Updated: 10/27/2021 17:52
Changes: 10/20/2021 09:59 (46), 10/27/2021 17:52 (1)
Complete: 🔍
Cache ID: 216::103