CVE-2021-32399: Race Condition
First published: Mon May 10 2021(Updated: )
A flaw was found in the Linux kernel’s handling of the removal of Bluetooth HCI controllers. This flaw allows an attacker with a local account to exploit a race condition, leading to corrupted memory and possible privilege escalation. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:2.6.32-754.43.1.el6 | 0:2.6.32-754.43.1.el6 |
| redhat/kernel-rt | <0:3.10.0-1160.41.1.rt56.1181.el7 | 0:3.10.0-1160.41.1.rt56.1181.el7 |
| redhat/kernel | <0:3.10.0-1160.41.1.el7 | 0:3.10.0-1160.41.1.el7 |
| redhat/kernel | <0:3.10.0-327.100.1.el7 | 0:3.10.0-327.100.1.el7 |
| redhat/kernel | <0:3.10.0-514.92.1.el7 | 0:3.10.0-514.92.1.el7 |
| redhat/kernel | <0:3.10.0-693.94.1.el7 | 0:3.10.0-693.94.1.el7 |
| redhat/kernel | <0:3.10.0-957.80.1.el7 | 0:3.10.0-957.80.1.el7 |
| redhat/kernel | <0:3.10.0-1062.56.1.el7 | 0:3.10.0-1062.56.1.el7 |
| redhat/kernel-rt | <0:4.18.0-305.10.2.rt7.83.el8_4 | 0:4.18.0-305.10.2.rt7.83.el8_4 |
| redhat/kernel | <0:4.18.0-305.10.2.el8_4 | 0:4.18.0-305.10.2.el8_4 |
| redhat/kernel | <0:4.18.0-147.52.1.el8_1 | 0:4.18.0-147.52.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.64.1.rt13.115.el8_2 | 0:4.18.0-193.64.1.rt13.115.el8_2 |
| redhat/kernel | <0:4.18.0-193.64.1.el8_2 | 0:4.18.0-193.64.1.el8_2 |
| redhat/redhat-virtualization-host | <0:4.3.18-20210903.0.el7_9 | 0:4.3.18-20210903.0.el7_9 |
| redhat/redhat-virtualization-host | <0:4.4.7-20210715.1.el8_4 | 0:4.4.7-20210715.1.el8_4 |
| Linux Kernel | <=5.12.2 | |
| Debian GNU/Linux | =9.0 | |
| netapp cloud backup | ||
| All of | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| All of | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| All of | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| All of | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| All of | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| All of | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| All of | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| All of | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| netapp h300s firmware | ||
| netapp h300s | ||
| NetApp H500S Firmware | ||
| netapp h500s | ||
| netapp h700s firmware | ||
| netapp h700s | ||
| netapp h300e firmware | ||
| netapp h300e | ||
| netapp h500e firmware | ||
| netapp h500e | ||
| netapp h700e firmware | ||
| netapp h700e | ||
| netapp h410s firmware | ||
| netapp h410s | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
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 the BIOS level which will also provide 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
- https://www.cve.org/CVERecord?id=CVE-2021-32399 https://nvd.nist.gov/vuln/detail/CVE-2021-32399
- https://bugzilla.redhat.com/show_bug.cgi?id=1970807
- https://access.redhat.com/errata/RHSA-2022:0157
- https://access.redhat.com/errata/RHSA-2021:3328
- https://access.redhat.com/errata/RHSA-2021:3327
- https://access.redhat.com/errata/RHSA-2021:3381
- https://access.redhat.com/errata/RHSA-2021:3399
- https://access.redhat.com/errata/RHSA-2021:3321
- https://access.redhat.com/errata/RHSA-2021:3725
- https://access.redhat.com/errata/RHSA-2021:3320
- https://access.redhat.com/errata/RHSA-2021:3392
- https://access.redhat.com/errata/RHSA-2021:3522
- https://access.redhat.com/errata/RHSA-2021:3523
- https://access.redhat.com/errata/RHSA-2021:2715
- https://access.redhat.com/errata/RHSA-2021:2714
- https://access.redhat.com/errata/RHSA-2021:2716
- https://access.redhat.com/errata/RHSA-2021:3173
- https://access.redhat.com/errata/RHSA-2021:3181
- https://access.redhat.com/errata/RHSA-2021:3375
- https://access.redhat.com/errata/RHSA-2021:3363
- https://access.redhat.com/errata/RHSA-2021:3380
- https://access.redhat.com/errata/RHSA-2021:3477
- https://access.redhat.com/errata/RHSA-2021:2736
- https://access.redhat.com/security/cve/cve-2021-32399
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e2cb6b891ad2b8caa9131e3be70f45243df82a80
- https://github.com/torvalds/linux/commit/e2cb6b891ad2b8caa9131e3be70f45243df82a80
- http://www.openwall.com/lists/oss-security/2021/05/11/2
- https://security.netapp.com/advisory/ntap-20210622-0006/
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
- https://launchpad.net/bugs/cve/CVE-2021-32399
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1970809
- https://www.openwall.com/lists/oss-security/2021/05/11/2
- https://security-tracker.debian.org/tracker/CVE-2021-32399
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32399
- https://nvd.nist.gov/vuln/detail/CVE-2021-32399
- https://ubuntu.com/security/CVE-2021-32399
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2021-32399?
CVE-2021-32399 is considered a medium severity vulnerability due to its potential for privilege escalation.
How do I fix CVE-2021-32399?
To fix CVE-2021-32399, upgrade to the recommended kernel versions specified by your distribution.
What systems are affected by CVE-2021-32399?
CVE-2021-32399 affects various versions of the Linux kernel and specific Red Hat packages.
Can CVE-2021-32399 be exploited remotely?
No, CVE-2021-32399 requires a local account for exploitation, limiting its attack surface.
What impact does CVE-2021-32399 have on systems?
CVE-2021-32399 can lead to memory corruption and potential privilege escalation, impacting system integrity.
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- canonical/netapp h500s
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- canonical/netapp h700s
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- canonical/netapp h700e firmware
- canonical/netapp h700e
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