Ubuntu update for bluez
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-26558 CVE-2020-27153 CVE-2021-3588 |
| CWE-ID | CWE-254 CWE-415 CWE-125 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system bluez (Ubuntu package) Operating systems & Components / Operating system package or component libbluetooth3 (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Security features bypass
EUVDB-ID: #VU53579
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2020-26558
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to an impersonation in the Passkey Entry protocol flaw. A remote attacker on the local network can perform a man-in-the-middle (MITM) attack and impersonate the initiating device without any previous knowledge.
Note: This vulnerability affects the following specifications:
- BR/EDR Secure Simple Pairing in Bluetooth Core Specifications 2.1 through 5.2
- BR/EDR Secure Connections Pairing in Bluetooth Core Specifications 4.1 through 5.2
- LE Secure Connections Pairing in Bluetooth Core Specifications 4.2 through 5.2
Mitigation
Update the affected package bluez to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 21.04
bluez (Ubuntu package): before 5.48-0ubuntu3.5
libbluetooth3 (Ubuntu package): before 5.48-0ubuntu3.5
CPE2.3- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:21.04:*:*:*:*:*:*:*
- cpe:2.3:a:canonical:bluez_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:libbluetooth3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-4989-1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Double Free
EUVDB-ID: #VU48203
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-27153
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the gatttool disconnect_cb() routine from shared/att.c. A remote attacker can cause a denial of service or code execution, during service discovery, due to a redundant disconnect MGMT event.
MitigationUpdate the affected package bluez to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 21.04
bluez (Ubuntu package): before 5.48-0ubuntu3.5
libbluetooth3 (Ubuntu package): before 5.48-0ubuntu3.5
CPE2.3- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:21.04:*:*:*:*:*:*:*
- cpe:2.3:a:canonical:bluez_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:libbluetooth3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-4989-1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Out-of-bounds read
EUVDB-ID: #VU67751
Risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-3588
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the cli_feat_read_cb() function in src/gatt-database.c. A remote attacker on the local network can trigger an out-of-bounds read error and read contents of memory on the system.
MitigationUpdate the affected package bluez to the latest version.
Vulnerable software versionsUbuntu: 18.04 - 21.04
bluez (Ubuntu package): before 5.48-0ubuntu3.5
libbluetooth3 (Ubuntu package): before 5.48-0ubuntu3.5
CPE2.3- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:21.04:*:*:*:*:*:*:*
- cpe:2.3:a:canonical:bluez_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:a:canonical:libbluetooth3_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-4989-1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
