CVE-2020-27153

2020-10-1500:00:00

ubuntu.com

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

0.05 Low

EPSS

Percentile

92.7%

JSON

In BlueZ before 5.55, a double free was found in the gatttool
disconnect_cb() routine from shared/att.c. A remote attacker could
potentially cause a denial of service or code execution, during service
discovery, due to a redundant disconnect MGMT event.

Bugs

<https://bugzilla.redhat.com/show_bug.cgi?id=1884817>

Notes

Author	Note
mdeslaur	per Red Hat, there is currently no known path to code execution as there is a small time window between the two calls to free() as such, marking as low priority.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchbluez< 5.48-0ubuntu3.5UNKNOWN
ubuntu20.04noarchbluez< 5.53-0ubuntu3.2UNKNOWN
ubuntu20.10noarchbluez< 5.55-0ubuntu1UNKNOWN
ubuntu21.04noarchbluez< 5.55-0ubuntu1UNKNOWN
ubuntu21.10noarchbluez< 5.55-0ubuntu1UNKNOWN
ubuntu22.04noarchbluez< 5.55-0ubuntu1UNKNOWN
ubuntu16.04noarchbluez< 5.37-0ubuntu5.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	bluez	< 5.48-0ubuntu3.5	UNKNOWN
ubuntu	20.04	noarch	bluez	< 5.53-0ubuntu3.2	UNKNOWN
ubuntu	20.10	noarch	bluez	< 5.55-0ubuntu1	UNKNOWN
ubuntu	21.04	noarch	bluez	< 5.55-0ubuntu1	UNKNOWN
ubuntu	21.10	noarch	bluez	< 5.55-0ubuntu1	UNKNOWN
ubuntu	22.04	noarch	bluez	< 5.55-0ubuntu1	UNKNOWN
ubuntu	16.04	noarch	bluez	< 5.37-0ubuntu5.3+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN