An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-680645 advisory.

    An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3879 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3879-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                          Adrian Bunk     September 07, 2024                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : bluez     Version        : 5.55-3.1+deb11u2     CVE ID         : CVE-2021-3658 CVE-2021-41229 CVE-2021-43400 CVE-2022-0204                      CVE-2022-39176 CVE-2022-39177 CVE-2023-27349 CVE-2023-50229                      CVE-2023-50230     Debian Bug     : 991596 998626 1000262 1003712

    Multiple vulnerabilities have been fixed in bluez library, tools and     daemons for using Bluetooth devices.

    CVE-2021-3658

        adapter: Fix storing discoverable setting

    CVE-2021-41229

        Memory leak in the SDP protocol

    CVE-2021-43400

        Use-after-free on client disconnect

    CVE-2022-0204

        GATT heap overflow

    CVE-2022-39176

        Proximate attackers could obtain sensitive information

    CVE-2022-39177

        Proximate attackers could cause denial of service

    CVE-2023-27349

        AVRCP crash while handling unsupported events

    CVE-2023-50229

        Phone Book Access profile Heap-based Buffer Overflow

    CVE-2023-50230

        Phone Book Access profile Heap-based Buffer Overflow

    For Debian 11 bullseye, these problems have been fixed in version     5.55-3.1+deb11u2.

    We recommend that you upgrade your bluez packages.

    For the detailed security status of bluez please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/bluez

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the bluez package has been released.

According to the versions of the bluez package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a     SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server     into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The     root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check     whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the     same. (CVE-2019-8921)

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on     whether there is enough space in the destination buffer. The function simply appends all data passed to     it. The values of all attributes that are requested are appended to the output buffer. There are no size     checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is     large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by     process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:3981-1 advisory.

  - bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and     restores it when powered up. If a device is powered down while discoverable, it will be discoverable when     powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby     attackers. (CVE-2021-3658)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3157 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3157-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Sylvain Beucler     October 24, 2022                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : bluez     Version        : 5.50-1.2~deb10u3     CVE ID         : CVE-2019-8921 CVE-2019-8922 CVE-2021-41229 CVE-2021-43400                      CVE-2022-0204 CVE-2022-39176 CVE-2022-39177     Debian Bug     : 998626 1000262 1003712

    Several vulnerabilities were discovered in BlueZ, the Linux Bluetooth     protocol stack. An attacker could cause a denial-of-service (DoS) or     leak information.

    CVE-2019-8921

        SDP infoleak, the vulnerability lies in the handling of a         SVC_ATTR_REQ by the SDP implementation of BlueZ. By crafting a         malicious CSTATE, it is possible to trick the server into         returning more bytes than the buffer actually holds, resulting in         leaking arbitrary heap data.

    CVE-2019-8922

        SDP Heap Overflow; this vulnerability lies in the SDP protocol         handling of attribute requests as well. By requesting a huge         number of attributes at the same time, an attacker can overflow         the static buffer provided to hold the response.

    CVE-2021-41229

        sdp_cstate_alloc_buf allocates memory which will always be hung in         the singly linked list of cstates and will not be freed. This will         cause a memory leak over time. The data can be a very large         object, which can be caused by an attacker continuously sending         sdp packets and this may cause the service of the target device to         crash.

    CVE-2021-43400

        A use-after-free in gatt-database.c can occur when a client         disconnects during D-Bus processing of a WriteValue call.

    CVE-2022-0204

        A heap overflow vulnerability was found in bluez. An attacker with         local network access could pass specially crafted files causing an         application to halt or crash, leading to a denial of service.

    CVE-2022-39176

        BlueZ allows physically proximate attackers to obtain sensitive         information because profiles/audio/avrcp.c does not validate         params_len.

    CVE-2022-39177

        BlueZ allows physically proximate attackers to cause a denial of         service because malformed and invalid capabilities can be         processed in profiles/audio/avdtp.c.

    For Debian 10 buster, these problems have been fixed in version     5.50-1.2~deb10u3.

    We recommend that you upgrade your bluez packages.

    For the detailed security status of bluez please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/bluez

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:3687-1 advisory.

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a     SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server     into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The     root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check     whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the     same. (CVE-2019-8921)

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on     whether there is enough space in the destination buffer. The function simply appends all data passed to     it. The values of all attributes that are requested are appended to the output buffer. There are no size     checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is     large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by     process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby     man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication     procedure) by reflection of the public key and the authentication evidence of the initiating device,     potentially permitting this attacker to complete authenticated pairing with the responding device using     the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit     at a time. (CVE-2020-26558)

  - Improper access control in BlueZ may allow an authenticated user to potentially enable information     disclosure via adjacent access. (CVE-2021-0129)

  - bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and     restores it when powered up. If a device is powered down while discoverable, it will be discoverable when     powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby     attackers. (CVE-2021-3658)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:3691-1 advisory.

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a     SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server     into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The     root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check     whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the     same. (CVE-2019-8921)

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on     whether there is enough space in the destination buffer. The function simply appends all data passed to     it. The values of all attributes that are requested are appended to the output buffer. There are no size     checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is     large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by     process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby     man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication     procedure) by reflection of the public key and the authentication evidence of the initiating device,     potentially permitting this attacker to complete authenticated pairing with the responding device using     the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit     at a time. (CVE-2020-26558)

  - Improper access control in BlueZ may allow an authenticated user to potentially enable information     disclosure via adjacent access. (CVE-2021-0129)

  - bluetoothd from bluez incorrectly saves adapters' Discoverable status when a device is powered down, and     restores it when powered up. If a device is powered down while discoverable, it will be discoverable when     powered on again. This could lead to inadvertent exposure of the bluetooth stack to physically nearby     attackers. (CVE-2021-3658)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the bluez packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a     SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server     into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The     root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check     whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the     same. (CVE-2019-8921)

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on     whether there is enough space in the destination buffer. The function simply appends all data passed to     it. The values of all attributes that are requested are appended to the output buffer. There are no size     checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is     large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by     process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

  - A heap overflow vulnerability was found in bluez in versions prior to 5.63. An attacker with local network     access could pass specially crafted files causing an application to halt or crash, leading to a denial of     service. (CVE-2022-0204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bluez packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a     SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server     into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The     root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check     whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the     same. (CVE-2019-8921)

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on     whether there is enough space in the destination buffer. The function simply appends all data passed to     it. The values of all attributes that are requested are appended to the output buffer. There are no size     checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is     large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by     process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

  - A heap overflow vulnerability was found in bluez in versions prior to 5.63. An attacker with local network     access could pass specially crafted files causing an application to halt or crash, leading to a denial of     service. (CVE-2022-0204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bluez package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on     whether there is enough space in the destination buffer. The function simply appends all data passed to     it. The values of all attributes that are requested are appended to the output buffer. There are no size     checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is     large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by     process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bluez package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bluez package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bluez packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

  - A heap overflow vulnerability was found in bluez in versions prior to 5.63. An attacker with local network     access could pass specially crafted files causing an application to halt or crash, leading to a denial of     service. (CVE-2022-0204)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the bluez packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a     SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server     into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The     root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check     whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the     same. (CVE-2019-8921)

  - An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client     disconnects during D-Bus processing of a WriteValue call. (CVE-2021-43400)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5155-1 advisory.

    It was discovered that BlueZ incorrectly handled the Discoverable status when a device is powered down.
    This could result in devices being powered up discoverable, contrary to expectations. This issue only     affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10. (CVE-2021-3658)

    It was discovered that BlueZ incorrectly handled certain memory operations. A remote attacker could     possibly use this issue to cause BlueZ to consume resources, leading to a denial of service.
    (CVE-2021-41229)

    It was discovered that the BlueZ gatt server incorrectly handled disconnects. A remote attacker could     possibly use this issue to cause BlueZ to crash, leading to a denial of service. (CVE-2021-43400)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
267046	Unity Linux 20.1070e Security Update: bluez (UTSA-2025-680645)	Nessus	Unity Linux Local Security Checks	critical
258243	Linux Distros Unpatched Vulnerability : CVE-2021-43400	Nessus	Misc.	critical
206762	Debian dla-3879 : bluetooth - security update	Nessus	Debian Local Security Checks	critical
204637	Photon OS 3.0: Bluez PHSA-2023-3.0-0570	Nessus	PhotonOS Local Security Checks	critical
203188	Photon OS 4.0: Bluez PHSA-2023-4.0-0380	Nessus	PhotonOS Local Security Checks	critical
169620	EulerOS Virtualization 3.0.2.6 : bluez (EulerOS-SA-2023-1090)	Nessus	Huawei Local Security Checks	critical
167726	SUSE SLED15 / SLES15 Security Update : bluez (SUSE-SU-2022:3981-1)	Nessus	SuSE Local Security Checks	critical
166429	Debian dla-3157 : bluetooth - security update	Nessus	Debian Local Security Checks	critical
166424	SUSE SLES15 Security Update : bluez (SUSE-SU-2022:3687-1)	Nessus	SuSE Local Security Checks	critical
166417	SUSE SLES15 Security Update : bluez (SUSE-SU-2022:3691-1)	Nessus	SuSE Local Security Checks	critical
165877	EulerOS Virtualization 3.0.6.6 : bluez (EulerOS-SA-2022-2488)	Nessus	Huawei Local Security Checks	critical
161589	EulerOS 2.0 SP3 : bluez (EulerOS-SA-2022-1707)	Nessus	Huawei Local Security Checks	critical
160690	EulerOS Virtualization 3.0.2.0 : bluez (EulerOS-SA-2022-1687)	Nessus	Huawei Local Security Checks	critical
160654	EulerOS 2.0 SP10 : bluez (EulerOS-SA-2022-1643)	Nessus	Huawei Local Security Checks	critical
160648	EulerOS 2.0 SP10 : bluez (EulerOS-SA-2022-1657)	Nessus	Huawei Local Security Checks	critical
160616	EulerOS Virtualization 2.9.1 : bluez (EulerOS-SA-2022-1604)	Nessus	Huawei Local Security Checks	critical
160610	EulerOS Virtualization 2.9.0 : bluez (EulerOS-SA-2022-1627)	Nessus	Huawei Local Security Checks	critical
160171	EulerOS 2.0 SP8 : bluez (EulerOS-SA-2022-1557)	Nessus	Huawei Local Security Checks	critical
160126	EulerOS 2.0 SP5 : bluez (EulerOS-SA-2022-1524)	Nessus	Huawei Local Security Checks	critical
159782	EulerOS 2.0 SP9 : bluez (EulerOS-SA-2022-1444)	Nessus	Huawei Local Security Checks	critical
159772	EulerOS 2.0 SP9 : bluez (EulerOS-SA-2022-1423)	Nessus	Huawei Local Security Checks	critical
155687	Ubuntu 18.04 LTS / 20.04 LTS : BlueZ vulnerabilities (USN-5155-1)	Nessus	Ubuntu Local Security Checks	critical

Detections

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CVE-2021-43400

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