CVE-2021-3612: Input Validation
First published: Sun Jun 20 2021(Updated: )
An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-372.9.1.rt7.166.el8 | 0:4.18.0-372.9.1.rt7.166.el8 |
| redhat/kernel | <0:4.18.0-372.9.1.el8 | 0:4.18.0-372.9.1.el8 |
| redhat/kernel | <5.9 | 5.9 |
| 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 | |
| Linux Kernel | <5.9.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| Fedora | =34 | |
| Debian | =9.0 | |
| oracle communications Cloud native core binding support function | =22.1.3 | |
| oracle communications cloud native core network exposure function | =22.1.1 | |
| oracle communications Cloud native core policy | =22.2.0 | |
| 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 | ||
| All of | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| 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 | ||
| netapp h410c firmware | ||
| netapp h410c |
Remedy
To mitigate this issue, prevent the module joydev from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2021-3612 https://nvd.nist.gov/vuln/detail/CVE-2021-3612 https://lore.kernel.org/linux-input/20210620120030.1513655-1-avlarkin82@gmail.com/
- https://bugzilla.redhat.com/show_bug.cgi?id=1974079
- https://access.redhat.com/errata/RHSA-2022:1975
- https://access.redhat.com/errata/RHSA-2022:1988
- https://access.redhat.com/security/cve/cve-2021-3612
- https://lore.kernel.org/linux-input/20210620120030.1513655-1-avlarkin82@gmail.com/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YKGI562LFV5MESTMVTCG5RORSBT6NGBN/
- https://security.netapp.com/advisory/ntap-20210805-0005/
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://launchpad.net/bugs/cve/CVE-2021-3612
- https://lore.kernel.org/linux-input/20210219083215.GS2087@kadam/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1974080
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YKGI562LFV5MESTMVTCG5RORSBT6NGBN/
- https://lore.kernel.org/linux-input/20210620120030.1513655-1-avlarkin82%40gmail.com/
- https://security-tracker.debian.org/tracker/CVE-2021-3612
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3612
- https://nvd.nist.gov/vuln/detail/CVE-2021-3612
- https://ubuntu.com/security/CVE-2021-3612
Frequently Asked Questions
What is the severity of CVE-2021-3612?
CVE-2021-3612 has a high severity rating due to its potential to crash the system or escalate privileges for local users.
How do I fix CVE-2021-3612?
To fix CVE-2021-3612, upgrade to kernel version 5.9 or later, or apply the provided security patches for your affected Linux distribution.
Which Linux kernel versions are affected by CVE-2021-3612?
CVE-2021-3612 affects Linux kernel versions prior to 5.9-rc1.
Can CVE-2021-3612 be exploited remotely?
No, CVE-2021-3612 can only be exploited by a local user with access to the system.
What types of systems are vulnerable to CVE-2021-3612?
Systems running affected versions of the Linux kernel, including various distributions like Red Hat Enterprise Linux and Debian, are vulnerable to CVE-2021-3612.
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- version/oracle communications cloud native core binding support function/22.1.3
- canonical/oracle communications cloud native core network exposure function
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- canonical/oracle communications cloud native core policy
- version/oracle communications cloud native core policy/22.2.0
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- canonical/netapp solidfire baseboard management controller firmware
- canonical/netapp solidfire baseboard management controller
- canonical/netapp h300s firmware
- canonical/netapp h300s
- canonical/netapp h500s firmware
- canonical/netapp h500s
- canonical/netapp h700s firmware
- canonical/netapp h700s
- canonical/netapp h300e firmware
- canonical/netapp h300e
- canonical/netapp h500e firmware
- canonical/netapp h500e
- canonical/netapp h700e firmware
- canonical/netapp h700e
- canonical/netapp h410s firmware
- canonical/netapp h410s
- canonical/netapp h410c firmware
- canonical/netapp h410c