BlueZ up to 5.54 MGMT Event shared/att.c disconnect_cb double free

Summaryinfo

A vulnerability has been found in BlueZ up to 5.54 and classified as problematic. Affected is the function disconnect_cb of the file shared/att.c of the component MGMT Event Handler. Performing a manipulation results in double free. This vulnerability is identified as CVE-2020-27153. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in BlueZ up to 5.54. This affects the function disconnect_cb of the file shared/att.c of the component MGMT Event Handler. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 10/15/2020. It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2020-27153. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 5.55 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• BlueZ

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.17
• 5.18
• 5.19
• 5.20
• 5.21
• 5.22
• 5.23
• 5.24
• 5.25
• 5.26
• 5.27
• 5.28
• 5.29
• 5.30
• 5.31
• 5.32
• 5.33
• 5.34
• 5.35
• 5.36
• 5.37
• 5.38
• 5.39
• 5.40
• 5.41
• 5.42
• 5.43
• 5.44
• 5.45
• 5.46
• 5.47
• 5.48
• 5.49
• 5.50
• 5.51
• 5.52
• 5.53
• 5.54

License

• open-source

Website

• Product: https://github.com/bluez/bluez/

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