CVE-2018-18690
First published: Fri Oct 26 2018(Updated: )
In the Linux kernel before 4.17, a local attacker able to set attributes on an xfs filesystem could make this filesystem non-operational until the next mount by triggering an unchecked error condition during an xfs attribute change, because xfs_attr_shortform_addname in fs/xfs/libxfs/xfs_attr.c mishandles ATTR_REPLACE operations with conversion of an attr from short to long form.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 | |
| Linux kernel | <4.17 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Debian | =8.0 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7b38460dc8e4eafba06c78f8e37099d3b34d473c
- http://www.securityfocus.com/bid/105753
- https://bugzilla.kernel.org/show_bug.cgi?id=199119
- https://bugzilla.suse.com/show_bug.cgi?id=1105025
- https://github.com/torvalds/linux/commit/7b38460dc8e4eafba06c78f8e37099d3b34d473c
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://usn.ubuntu.com/3847-1/
- https://usn.ubuntu.com/3847-2/
- https://usn.ubuntu.com/3847-3/
- https://usn.ubuntu.com/3848-1/
- https://usn.ubuntu.com/3848-2/
- https://usn.ubuntu.com/3849-1/
- https://usn.ubuntu.com/3849-2/
- https://launchpad.net/bugs/cve/CVE-2018-18690
- https://git.kernel.org/linus/7b38460dc8e4eafba06c78f8e37099d3b34d473c
- https://security-tracker.debian.org/tracker/CVE-2018-18690
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18690
- https://nvd.nist.gov/vuln/detail/CVE-2018-18690
- https://ubuntu.com/security/CVE-2018-18690
Frequently Asked Questions
What is the severity of CVE-2018-18690?
CVE-2018-18690 is classified as a moderate severity vulnerability due to its potential impact on filesystem operations.
How do I fix CVE-2018-18690?
To fix CVE-2018-18690, upgrade to a kernel version that is 4.17 or newer.
Which systems are affected by CVE-2018-18690?
CVE-2018-18690 affects Linux kernel versions prior to 4.17 as well as specific Ubuntu and Debian releases.
What is the nature of the issue in CVE-2018-18690?
CVE-2018-18690 involves an unchecked error condition during an xfs attribute change, which can render the filesystem non-operational.
Can CVE-2018-18690 be exploited locally?
Yes, CVE-2018-18690 can be exploited by a local attacker with the ability to set attributes on an xfs filesystem.
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