CVE-2020-12352: Input Validation

Published Oct 8, 2020
·
Updated

An information leak flaw was found in the way Linux kernel Bluetooth stack implementation handled initialization of stack memory when handling certain AMP packets. A remote attacker in adjacent range could use this flaw to leak small portions of stack memory on the system by sending a specially crafted AMP packets.

Other sources

An information leak flaw was found in the way Linux kernel’s Bluetooth stack implementation handled initialization of stack memory when handling certain AMP (Alternate MAC-PHY Manager Protocol) packets. This flaw allows a remote attacker in an adjacent range to leak small portions of stack memory on the system by sending specially crafted AMP packets. The highest threat from this vulnerability is to data confidentiality.

Improper access control in BlueZ may allow an unauthenticated user to potentially enable information disclosure via adjacent access.

Affected Software

23 affected componentsFixes available
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<0:3.10.0-327.93.1.el7
0:3.10.0-327.93.1.el7
redhat/kernel<0:3.10.0-514.85.1.el7
0:3.10.0-514.85.1.el7
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
All of the following
Any of the following
Linux Linux kernel>=5.4<5.4.72
Linux Linux kernel>=5.8.0<5.8.16
Linux Linux kernel>=5.9.0<=5.9.13
BlueZ BlueZ
Linux Linux kernel>=5.4<5.4.72
Linux Linux kernel>=5.8.0<5.8.16
Linux Linux kernel>=5.9.0<=5.9.13
BlueZ BlueZ
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-16.12.27-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.2.2.rt56.1134.el7
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.2.2.el7
  3. Upgrade

    Upgrade redhat/kernel-alt to a version that resolves this vulnerability.

    Fixed in 0:4.14.0-115.32.1.el7a
  4. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-327.93.1.el7
  5. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-514.85.1.el7
  6. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-693.77.1.el7
  7. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-957.61.2.el7
  8. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1062.37.1.el7
  9. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.28.1.rt13.77.el8_2
  10. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.28.1.el8_2
  11. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-80.30.1.el8_0
  12. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-147.32.1.el8_1
  13. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
  14. Configuration

    Disable Bluetooth functionality by preventing the Bluetooth kernel modules from being loaded using system-wide modprobe rules.

    Linux kernel Bluetooth stack system-wide modprobe rules = Blocklist Bluetooth kernel modules

Event History

Oct 8, 2020
Data Sourced
via Red Hat·04:49 PM
DescriptionSeverityAffected Software
Oct 14, 2020
CVE Published
12:00 AM
News Published
via ZDNet·11:07 AM
Nov 23, 2020
CVE Published
via MITRE·04:15 PM
Data Sourced
via MITRE·04:15 PM
DescriptionWeakness
Jan 11, 2024
Data Sourced
via Launchpad·11:37 PM
Description
Jan 20, 2024
News Published
via ZDNet·05:13 AM
Apr 28, 2025
Data Sourced
via Ubuntu·04:20 AM
RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2020-12352?

CVE-2020-12352 is rated as a medium severity vulnerability due to its ability to leak information from stack memory.

2

How do I fix CVE-2020-12352?

To fix CVE-2020-12352, update to the appropriate kernel versions listed in your distribution's security advisory.

3

Which versions of the Linux kernel are affected by CVE-2020-12352?

CVE-2020-12352 affects multiple versions of the Linux kernel including certain 3.10, 4.14, and 5.x versions.

4

Can CVE-2020-12352 be exploited remotely?

Yes, CVE-2020-12352 can be exploited by a remote attacker within adjacent range to leak memory.

5

What types of systems are vulnerable to CVE-2020-12352?

Systems running affected versions of the Linux kernel that utilize Bluetooth functionality are vulnerable to CVE-2020-12352.

Company

Resources

Contact

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