high
8.8
CWE
20 843
Advisory Published
CVE Published
CVE Published
Updated

CVE-2020-12351: Input Validation

First published: Thu Oct 08 2020(Updated: )

A flaw was found in the way the Linux kernel Bluetooth implementation handled L2CAP packets with A2MP CID. A remote attacker in adjacent range could use this flaw to crash the system causing denial of service or potentially execute arbitrary code on the system by sending a specially crafted L2CAP packet.

Credit: secure@intel.com secure@intel.com secure@intel.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=4.7.7<4.9.240
Linux Linux kernel>=4.10<4.14.202
Linux Linux kernel>=4.15<4.19.152
Linux Linux kernel>=4.20<5.4.72
Linux Linux kernel>=5.5<5.8.16
Linux Linux kernel=5.9.0
Linux Linux kernel=5.9.0-rc1
Linux Linux kernel=5.9.0-rc2
Linux Linux kernel=5.9.0-rc3
Linux Linux kernel=5.9.0-rc4
Linux Linux kernel=5.9.0-rc5
Linux Linux kernel=5.9.0-rc6
Linux Linux kernel=5.9.1
redhat/kernel-rt<0:3.10.0-1160.2.2.rt56.1134.el7
0:3.10.0-1160.2.2.rt56.1134.el7
redhat/kernel<0:3.10.0-1160.2.2.el7
0:3.10.0-1160.2.2.el7
redhat/kernel-alt<0:4.14.0-115.32.1.el7a
0:4.14.0-115.32.1.el7a
redhat/kernel<0:3.10.0-693.77.1.el7
0:3.10.0-693.77.1.el7
redhat/kernel<0:3.10.0-957.61.2.el7
0:3.10.0-957.61.2.el7
redhat/kernel<0:3.10.0-1062.37.1.el7
0:3.10.0-1062.37.1.el7
redhat/kernel-rt<0:4.18.0-193.28.1.rt13.77.el8_2
0:4.18.0-193.28.1.rt13.77.el8_2
redhat/kernel<0:4.18.0-193.28.1.el8_2
0:4.18.0-193.28.1.el8_2
redhat/kernel<0:4.18.0-80.30.1.el8_0
0:4.18.0-80.30.1.el8_0
redhat/kernel<0:4.18.0-147.32.1.el8_1
0:4.18.0-147.32.1.el8_1
Linux Linux kernel=5.8
Linux Linux kernel=5.9
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.112-1
6.11.5-1
6.11.7-1

Remedy

To mitigate these vulnerabilities on the operating system level, disable the Bluetooth functionality via blocklisting kernel modules in the Linux kernel. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. Instructions on how to disable Bluetooth modules are available on the Customer Portal at https://access.redhat.com/solutions/2682931. Alternatively, Bluetooth can be disabled within the hardware or at BIOS level which will also provide an effective mitigation as the kernel will not be able to detect that Bluetooth hardware is present on the system.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2020-12351.

  • What is the severity of CVE-2020-12351?

    The severity of CVE-2020-12351 is high with a CVSS score of 8.8.

  • What is the impact of CVE-2020-12351?

    CVE-2020-12351 allows a remote attacker to crash the system, potentially causing a denial of service.

  • How can I fix CVE-2020-12351?

    To fix CVE-2020-12351, update the affected software to the recommended versions.

  • Where can I find more information about CVE-2020-12351?

    You can find more information about CVE-2020-12351 on the Red Hat Bugzilla and Red Hat Security Advisories websites.

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