Vulnerability Details : CVE-2018-18690
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.
Exploit prediction scoring system (EPSS) score for CVE-2018-18690
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 8 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2018-18690
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST |
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2018-18690
-
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-18690
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https://bugzilla.suse.com/show_bug.cgi?id=1105025
Bug 1105025 – VUL-0: CVE-2018-18690: kernel-source: xfs: xfstests generic/486 fail in xfs could be used by local users to disable filesystemsIssue Tracking;Third Party Advisory
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https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
[SECURITY] [DLA 1715-1] linux-4.9 security updateMailing List;Third Party Advisory
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https://github.com/torvalds/linux/commit/7b38460dc8e4eafba06c78f8e37099d3b34d473c
xfs: don't fail when converting shortform attr to long form during AT… · torvalds/linux@7b38460 · GitHubPatch;Third Party Advisory
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https://usn.ubuntu.com/3848-1/
USN-3848-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
[SECURITY] [DLA 1731-2] linux regression updateMailing List;Third Party Advisory
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https://usn.ubuntu.com/3847-2/
USN-3847-2: Linux kernel (HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://usn.ubuntu.com/3847-3/
USN-3847-3: Linux kernel (Azure) vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
[SECURITY] [DLA 1731-1] linux security updateMailing List;Third Party Advisory
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7b38460dc8e4eafba06c78f8e37099d3b34d473c
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
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https://usn.ubuntu.com/3849-1/
USN-3849-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
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http://www.securityfocus.com/bid/105753
Linux Kernel 'xfs_attr.c' Local Denial of Service VulnerabilityVDB Entry;Third Party Advisory
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https://usn.ubuntu.com/3847-1/
USN-3847-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://bugzilla.kernel.org/show_bug.cgi?id=199119
199119 – Replacing XFS extended attribute with longer value causes filesystem corruptionExploit;Issue Tracking;Vendor Advisory
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https://usn.ubuntu.com/3848-2/
USN-3848-2: Linux kernel (Xenial HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
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https://usn.ubuntu.com/3849-2/
USN-3849-2: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
Products affected by CVE-2018-18690
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*