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Multiple vulnerabilities in BlueZ implementation in Linux kernel



Published: 2020-10-13
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2020-12351
CVE-2020-12352
CVE-2020-24490
CWE ID CWE-20
CWE-284
CWE-119
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe 		Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Advisory

1) Input validation error

Risk: Medium

CVSSv3: 7.7 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-12351

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input within the BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.9.0

CPE External links

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-2-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-3-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-4-luiz.dentz@gmail.com/
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=a2ec905d1e160a33b2e210e45ad30445ef26ce0e

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) Improper access control

Risk: Medium

CVSSv3: 5.7 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-12352

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The vulnerability exists due to improper access restrictions in BlueZ implementation in Linux kernel. A remote attacker on the local network can pass specially crafted input to the application and gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.9.0

CPE External links

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-2-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-3-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-4-luiz.dentz@gmail.com/
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=a2ec905d1e160a33b2e210e45ad30445ef26ce0e

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.

3) Buffer overflow

Risk: Medium

CVSSv3: 6.4 [CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-24490

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within BlueZ  implementation in Linux kernel. A remote attacker on the local network can pass specially crated data to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.9.0

CPE External links

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00435.html
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-1-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-2-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-3-luiz.dentz@gmail.com/
https://lore.kernel.org/linux-bluetooth/20200806181714.3216076-4-luiz.dentz@gmail.com/
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=a2ec905d1e160a33b2e210e45ad30445ef26ce0e

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.