CVE-2018-18690

Public Exploit

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/3848-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3847-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3847-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3849-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3849-2/ third party advisory vendor advisory
https://usn.ubuntu.com/3848-1/ third party advisory vendor advisory
https://usn.ubuntu.com/3847-3/ third party advisory vendor advisory
https://bugzilla.suse.com/show_bug.cgi?id=1105025 issue tracking third party advisory
http://www.securityfocus.com/bid/105753 vdb entry third party advisory
https://bugzilla.kernel.org/show_bug.cgi?id=199119 issue tracking exploit vendor advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html third party advisory mailing list
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7b38460dc8e4eafba06c78f8e37099d3b34d473c patch vendor advisory
https://github.com/torvalds/linux/commit/7b38460dc8e4eafba06c78f8e37099d3b34d473c third party advisory patch
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2018-18690?
CVE-2018-18690 has been scored as a medium severity vulnerability.
How to fix CVE-2018-18690?
To fix CVE-2018-18690, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-18690 being actively exploited in the wild?
It is possible that CVE-2018-18690 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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