Ubuntu update for bluez



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-8921
CVE-2019-8922
CWE-ID CWE-125
CWE-122
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

libbluetooth3 (Ubuntu package)
Operating systems & Components / Operating system package or component

bluez (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU68830

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-2019-8921

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to missing verification checks when handling consecutive SVC_ATTR_REQ requests within the service_attr_req() function in sdpd-request.c in bluetoothd . A remote attacker on the local network can send specially crafted CSTATE data to the system and trick the server into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data.

Mitigation

Update the affected package bluez to the latest version.

Vulnerable software versions

Ubuntu: 16.04

libbluetooth3 (Ubuntu package): before Ubuntu Pro

bluez (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7265-1


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) Heap-based buffer overflow

EUVDB-ID: #VU66694

Risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-8922

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within bluetoothd. A remote attacker on the local network can send specially crafted data to the system, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package bluez to the latest version.

Vulnerable software versions

Ubuntu: 16.04

libbluetooth3 (Ubuntu package): before Ubuntu Pro

bluez (Ubuntu package): before Ubuntu Pro

CPE2.3 External links

https://ubuntu.com/security/notices/USN-7265-1


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.



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