Zephyr 2.4.0/2.5.0 L2CAP Channel use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Zephyr 2.4.0/2.5.0. This vulnerability affects unknown code of the component L2CAP Channel Handler. Such manipulation leads to use after free. This vulnerability is listed as CVE-2021-3455. The attack must be carried out from within the local network. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Zephyr 2.4.0/2.5.0. Affected by this issue is an unknown code block of the component L2CAP Channel Handler. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability.

The weakness was presented 10/20/2021 as GHSA-7g38-3x9v-v7vp. The advisory is available at github.com. This vulnerability is handled as CVE-2021-3455 since 03/19/2021. The technical details are unknown and an exploit is not available.

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

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Productinfo

Name

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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-7g38-3x9v-v7vp
Status: Confirmed

CVE: CVE-2021-3455 (🔍)
GCVE (CVE): GCVE-0-2021-3455
GCVE (VulDB): GCVE-100-185078

Entryinfo

Created: 10/20/2021 09:55
Updated: 10/27/2021 16:54
Changes: 10/20/2021 09:55 (47), 10/27/2021 16:54 (1)
Complete: 🔍
Cache ID: 216::103

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