CVE-2018-1092 Detail

Current Description

The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.5 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://openwall.com/lists/oss-security/2018/03/29/1 Mailing List  Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:2948
https://access.redhat.com/errata/RHSA-2018:3083
https://access.redhat.com/errata/RHSA-2018:3096
https://bugzilla.kernel.org/show_bug.cgi?id=199179 Issue Tracking 
https://bugzilla.kernel.org/show_bug.cgi?id=199275 Issue Tracking 
https://bugzilla.redhat.com/show_bug.cgi?id=1560777 Issue Tracking  Third Party Advisory 
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44 Patch 
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
https://usn.ubuntu.com/3676-1/
https://usn.ubuntu.com/3676-2/
https://usn.ubuntu.com/3677-1/
https://usn.ubuntu.com/3677-2/
https://usn.ubuntu.com/3678-1/
https://usn.ubuntu.com/3678-2/
https://usn.ubuntu.com/3678-3/
https://usn.ubuntu.com/3678-4/
https://usn.ubuntu.com/3754-1/
https://www.debian.org/security/2018/dsa-4187
https://www.debian.org/security/2018/dsa-4188

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-1092
NVD Published Date:
04/01/2018
NVD Last Modified:
10/31/2018
Source:
Red Hat, Inc.