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 Software | Affected Version | How 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 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00036.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1884817
- https://github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a
- https://github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07
- https://lists.debian.org/debian-lts-announce/2020/10/msg00022.html
- https://security.gentoo.org/glsa/202011-01
- https://www.debian.org/security/2021/dsa-4951
- https://launchpad.net/bugs/cve/CVE-2020-27153
- https://access.redhat.com/solutions/2682931
- https://access.redhat.com/errata/RHSA-2021:1598
- https://access.redhat.com/security/cve/cve-2020-27153
- https://git.kernel.org/pub/scm/bluetooth/bluez.git/commit/?id=1cd644db8c23a2f530ddb93cebed7dacc5f5721a
- https://security-tracker.debian.org/tracker/CVE-2020-27153
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27153
- https://nvd.nist.gov/vuln/detail/CVE-2020-27153
- https://ubuntu.com/security/CVE-2020-27153
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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