8.6
CWE
415
Advisory Published
CVE Published
Updated

CVE-2020-27153: Double Free

First published: Fri Oct 02 2020(Updated: )

A double-free vulnerability was found in bluez-5.54's gatttool disconnect_cb() routine from /src/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. References: 1. <a href="https://github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07">https://github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07</a> 2. <a href="https://github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a">https://github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
BlueZ BlueZ<5.55
Debian Debian Linux=9.0
Debian Debian Linux=10.0
openSUSE Leap=15.1
openSUSE Leap=15.2
redhat/bluez<5.55
5.55
debian/bluez
5.55-3.1+deb11u1
5.55-3.1+deb11u2
5.66-1+deb12u2
5.66-1+deb12u1
5.77-1
5.79-1

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Frequently Asked Questions

  • What is CVE-2020-27153?

    CVE-2020-27153 is a vulnerability in BlueZ before 5.55 that allows a remote attacker to cause a denial of service or execute arbitrary code.

  • What is the severity of CVE-2020-27153?

    CVE-2020-27153 has a severity rating of medium, with a severity value of 4.

  • How does CVE-2020-27153 impact the affected software?

    CVE-2020-27153 affects BlueZ versions before 5.55, potentially leading to a denial of service or code execution during service discovery.

  • How can I fix CVE-2020-27153?

    To fix CVE-2020-27153, update to version 5.55-0ubuntu1 for Ubuntu, 5.55 for Red Hat, or follow the appropriate update instructions for your distribution.

  • Where can I find more information about CVE-2020-27153?

    More information about CVE-2020-27153 can be found in the references: [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=1884817) and [GitHub commits](https://github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a, https://github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07).

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