CVE-2020-9383
First published: Fri Feb 21 2020(Updated: )
An issue was discovered in the Linux kernel 3.16 through 5.5.6. set_fdc in drivers/block/floppy.c leads to a wait_til_ready out-of-bounds read because the FDC index is not checked for errors before assigning it, aka CID-2e90ca68b0d2.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.rt56.1131.el7 | 0:3.10.0-1160.rt56.1131.el7 |
| redhat/kernel-alt | <0:4.14.0-115.21.2.el7a | 0:4.14.0-115.21.2.el7a |
| redhat/kernel | <0:3.10.0-1160.el7 | 0:3.10.0-1160.el7 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.13-1 | |
| Linux Kernel | >=3.16<=5.5.6 | |
| Debian | =8.0 | |
| Debian | =9.0 | |
| openSUSE | =15.1 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =19.10 | |
| NetApp Active IQ Unified Manager for VMware vSphere | ||
| netapp cloud backup | ||
| netapp data availability services | ||
| netapp hci management node | ||
| netapp solidfire | ||
| NetApp SteelStore | ||
| All of | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| All of | ||
| netapp h410c firmware | ||
| netapp h410c | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| netapp h410c firmware | ||
| netapp h410c |
Remedy
Mitigation for this issue is to skip loading the affected floppy driver module onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-9383 https://nvd.nist.gov/vuln/detail/CVE-2020-9383
- https://bugzilla.redhat.com/show_bug.cgi?id=1810685
- https://access.redhat.com/errata/RHSA-2020:4062
- https://access.redhat.com/errata/RHSA-2020:2104
- https://access.redhat.com/errata/RHSA-2020:4060
- https://access.redhat.com/security/cve/cve-2020-9383
- https://github.com/torvalds/linux/commit/2e90ca68b0d2f5548804f22f0dd61145516171e3
- https://security.netapp.com/advisory/ntap-20200313-0003/
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html
- https://usn.ubuntu.com/4344-1/
- https://usn.ubuntu.com/4345-1/
- https://usn.ubuntu.com/4342-1/
- https://usn.ubuntu.com/4346-1/
- https://www.debian.org/security/2020/dsa-4698
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=2f9ac30a54dc0181ddac3705cdcf4775d863c530
- https://launchpad.net/bugs/cve/CVE-2020-9383
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1810687
- https://access.redhat.com/solutions/41278
- https://git.kernel.org/linus/2e90ca68b0d2f5548804f22f0dd61145516171e3
- https://security-tracker.debian.org/tracker/CVE-2020-9383
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9383
- https://nvd.nist.gov/vuln/detail/CVE-2020-9383
- https://ubuntu.com/security/CVE-2020-9383
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2020-9383?
CVE-2020-9383 is classified as a medium severity vulnerability that can lead to an out-of-bounds read in the Linux kernel.
How do I fix CVE-2020-9383?
To fix CVE-2020-9383, upgrade to a patched version of the Linux kernel, such as kernel-rt 0:3.10.0-1160.rt56.1131.el7 or kernel 0:4.14.0-115.21.2.el7a.
Which versions of the Linux kernel are affected by CVE-2020-9383?
CVE-2020-9383 affects Linux kernel versions from 3.16 up to 5.5.6.
What type of vulnerability is CVE-2020-9383?
CVE-2020-9383 is an out-of-bounds memory access vulnerability found in the set_fdc function of the Linux kernel.
Which operating systems are impacted by CVE-2020-9383?
Operating systems that include affected versions of the Linux kernel, such as certain distributions of Debian, Ubuntu, and Red Hat, are impacted by CVE-2020-9383.
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