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CVE
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CVE-2018-1092Date: (C)2018-04-02   (M)2024-03-26


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 7.1
Exploit Score: 1.8Exploit Score: 8.6
Impact Score: 3.6Impact Score: 6.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: MEDIUM
Privileges Required: NONEAuthentication: NONE
User Interaction: REQUIREDConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: COMPLETE
Integrity: NONE 
Availability: HIGH 
  
Reference:
DSA-4187
DSA-4188
RHSA-2018:2948
RHSA-2018:3083
RHSA-2018:3096
USN-3676-1
USN-3676-2
USN-3677-1
USN-3677-2
USN-3678-1
USN-3678-2
USN-3678-3
USN-3678-4
USN-3754-1
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
http://openwall.com/lists/oss-security/2018/03/29/1
https://bugzilla.kernel.org/show_bug.cgi?id=199179
https://bugzilla.kernel.org/show_bug.cgi?id=199275
https://bugzilla.redhat.com/show_bug.cgi?id=1560777
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44

CWE    1
CWE-476
OVAL    31
oval:org.secpod.oval:def:52050
oval:org.secpod.oval:def:704114
oval:org.secpod.oval:def:704115
oval:org.secpod.oval:def:52051
...

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