CVE-2020-12654: Buffer Overflow

Published Jan 27, 2020
·
Updated

A flaw was found in the Linux kernel. The Marvell mwifiex driver allows a remote WiFi access point to trigger a heap-based memory buffer overflow due to an incorrect memcpy operation. The highest threat from this vulnerability is to data integrity and system availability.

Other sources

An issue was found in Linux kernel before 5.5.4. mwifiexretwmmgetstatus() in drivers/net/wireless/marvell/mwifiex/wmm.c allows a remote AP to trigger a heap-based buffer overflow because of an incorrect memcpy, aka CID-3a9b153c5591.

— Ubuntu

An issue was found in Linux kernel before 5.5.4. mwifiexretwmmgetstatus() in drivers/net/wireless/marvell/mwifiex/wmm.c allows a remote AP to trigger a heap-based buffer overflow because of an incorrect memcpy.

Reference and upstream commit: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.4 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3a9b153c5591548612c3955c9600a98150c81875

— Red Hat

Affected Software

14 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1127.18.2.rt56.1116.el7
0:3.10.0-1127.18.2.rt56.1116.el7
redhat/kernel<0:3.10.0-1127.18.2.el7
0:3.10.0-1127.18.2.el7
redhat/kernel<0:3.10.0-327.90.2.el7
0:3.10.0-327.90.2.el7
redhat/kernel<0:3.10.0-514.78.1.el7
0:3.10.0-514.78.1.el7
redhat/kernel<0:3.10.0-693.72.1.el7
0:3.10.0-693.72.1.el7
redhat/kernel<0:3.10.0-957.58.2.el7
0:3.10.0-957.58.2.el7
redhat/kernel<0:3.10.0-1062.31.2.el7
0:3.10.0-1062.31.2.el7
redhat/kernel-rt<0:4.18.0-193.13.2.rt13.65.el8_2
0:4.18.0-193.13.2.rt13.65.el8_2
redhat/kernel<0:4.18.0-193.13.2.el8_2
0:4.18.0-193.13.2.el8_2
redhat/kernel<0:4.18.0-80.27.1.el8_0
0:4.18.0-80.27.1.el8_0
redhat/kernel<0:4.18.0-147.24.2.el8_1
0:4.18.0-147.24.2.el8_1
redhat/kernel-rt<1:3.10.0-693.72.1.rt56.672.el6
1:3.10.0-693.72.1.rt56.672.el6
Linux Linux kernel<5.5.4
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

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 0:3.10.0-1127.18.2.rt56.1116.el7
  2. Upgrade

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

    Fixed in 0:3.10.0-1127.18.2.el7
  3. Upgrade

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

    Fixed in 0:3.10.0-327.90.2.el7
  4. Upgrade

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

    Fixed in 0:3.10.0-514.78.1.el7
  5. Upgrade

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

    Fixed in 0:3.10.0-693.72.1.el7
  6. Upgrade

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

    Fixed in 0:3.10.0-957.58.2.el7
  7. Upgrade

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

    Fixed in 0:3.10.0-1062.31.2.el7
  8. Upgrade

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

    Fixed in 0:4.18.0-193.13.2.rt13.65.el8_2
  9. Upgrade

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

    Fixed in 0:4.18.0-193.13.2.el8_2
  10. Upgrade

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

    Fixed in 0:4.18.0-80.27.1.el8_0
  11. Upgrade

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

    Fixed in 0:4.18.0-147.24.2.el8_1
  12. Upgrade

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

    Fixed in 1:3.10.0-693.72.1.rt56.672.el6
  13. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  14. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.5.4
  15. Configuration

    Blacklist the affected kernel module mwifiex to prevent the vulnerable code from being loaded.

    Linux kernel mwifiex module module loading = blacklisted

Event History

Jan 27, 2020
CVE Published
12:00 AM
May 5, 2020
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·04:47 AM
Data Sourced
via MITRE·04:47 AM
Description
Data Sourced
via NVD·05:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
May 6, 2020
Data Sourced
via Red Hat·07:19 PM
DescriptionSeverityAffected 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-2020-12654?

CVE-2020-12654 has been classified as a high severity vulnerability due to its potential impact on data integrity and system availability.

2

How do I fix CVE-2020-12654?

To mitigate CVE-2020-12654, update the Linux kernel to one of the secure versions provided by your distribution, such as kernel-rt or kernel from Red Hat.

3

What does CVE-2020-12654 affect?

CVE-2020-12654 affects the Linux kernel, specifically the Marvell mwifiex driver, which can be exploited via a remote WiFi access point.

4

Are all Linux kernel versions vulnerable to CVE-2020-12654?

No, only specific versions of the Linux kernel prior to the patches addressing CVE-2020-12654 are vulnerable.

5

Can CVE-2020-12654 result in system crashes?

Yes, exploitation of CVE-2020-12654 can lead to a heap-based memory buffer overflow, potentially causing system crashes or instability.

Company

Resources

Contact

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