CVE-2020-14314
First published: Fri Jun 05 2020(Updated: )
A memory out of bound read flaw was found in the Linux kernel's ext3/ext4 file system, in the way it accesses directory with broken indexing. This flaw allows a local user to crash the system if such directory exists.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.11.1.rt56.1145.el7 | 0:3.10.0-1160.11.1.rt56.1145.el7 |
| redhat/kernel | <0:3.10.0-1160.11.1.el7 | 0:3.10.0-1160.11.1.el7 |
| redhat/kernel-rt | <0:4.18.0-305.rt7.72.el8 | 0:4.18.0-305.rt7.72.el8 |
| redhat/kernel | <0:4.18.0-305.el8 | 0:4.18.0-305.el8 |
| redhat/Linux kernel version | <5.9 | 5.9 |
| Linux Kernel | <=5.8.9 | |
| Linux Kernel | =5.9.0-rc1 | |
| Debian GNU/Linux | =9.0 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Ubuntu Linux | =18.04 | |
| Ubuntu Linux | =20.04 | |
| StarWind Virtual SAN | =v8-build12533 | |
| StarWind Virtual SAN | =v8-build12658 | |
| StarWind Virtual SAN | =v8-build12859 | |
| StarWind Virtual SAN | =v8-build13170 | |
| StarWind Virtual SAN | =v8-build13586 | |
| StarWind Virtual SAN | =v8-build13861 | |
| 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 | |
| Debian | =9.0 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 |
Remedy
If any directories of the partition (or image) broken, the command "e2fsck -Df .../partition-name" fixes it.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-14314 https://nvd.nist.gov/vuln/detail/CVE-2020-14314 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1 https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7@redhat.com/T/#u
- https://bugzilla.redhat.com/show_bug.cgi?id=1853922
- https://access.redhat.com/errata/RHSA-2020:5441
- https://access.redhat.com/errata/RHSA-2020:5437
- https://access.redhat.com/errata/RHSA-2021:1739
- https://access.redhat.com/errata/RHSA-2021:1578
- https://access.redhat.com/security/cve/cve-2020-14314
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14314
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1
- https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7@redhat.com/T/#u
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- https://usn.ubuntu.com/4576-1/
- https://usn.ubuntu.com/4578-1/
- https://usn.ubuntu.com/4579-1/
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://www.starwindsoftware.com/security/sw-20210325-0003/
- https://launchpad.net/bugs/cve/CVE-2020-14314
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1854089
- https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7%40redhat.com/T/#u
- https://git.kernel.org/linus/5872331b3d91820e14716632ebb56b1399b34fe1
- https://security-tracker.debian.org/tracker/CVE-2020-14314
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14314
- https://nvd.nist.gov/vuln/detail/CVE-2020-14314
- https://ubuntu.com/security/CVE-2020-14314
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2020-14314?
CVE-2020-14314 has a medium severity rating due to its ability to cause a system crash under specific conditions.
How do I fix CVE-2020-14314?
To fix CVE-2020-14314, update your Linux kernel to version 5.10.223-1 or later.
What systems are affected by CVE-2020-14314?
CVE-2020-14314 affects various versions of the Linux kernel, specifically those prior to 5.9.
Can CVE-2020-14314 be exploited remotely?
CVE-2020-14314 requires local access to the system to exploit, as it pertains to out-of-bounds memory reads.
What is the nature of the flaw in CVE-2020-14314?
CVE-2020-14314 is a memory out-of-bounds read flaw in the ext3/ext4 file system due to broken directory indexing.
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