BlueZ 5.61 D-Bus gatt-database.c WriteValue use after free

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.
7.2$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in BlueZ 5.61. This impacts the function WriteValue of the file gatt-database.c of the component D-Bus Handler. This manipulation causes use after free. This vulnerability is registered as CVE-2021-43400. No exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as critical was found in BlueZ 5.61. Affected by this vulnerability is the function WriteValue of the file gatt-database.c of the component D-Bus Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 11/05/2021. The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2021-43400 since 11/04/2021. Technical details are known, but no exploit is available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.kernel.org

Timelineinfo

11/04/2021 🔍
11/05/2021 +1 days 🔍
11/05/2021 +0 days 🔍
11/04/2025 +1460 days 🔍

Sourcesinfo

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-43400 (🔍)
GCVE (CVE): GCVE-0-2021-43400
GCVE (VulDB): GCVE-100-186085

Entryinfo

Created: 11/05/2021 10:54
Updated: 11/04/2025 21:08
Changes: 11/05/2021 10:54 (40), 11/09/2021 21:45 (1), 11/04/2025 21:08 (33)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!