Vulnerability Details : CVE-2018-1094
Potential exploit
The ext4_fill_super function in fs/ext4/super.c in the Linux kernel through 4.15.15 does not always initialize the crc32c checksum driver, which allows attackers to cause a denial of service (ext4_xattr_inode_hash NULL pointer dereference and system crash) via a crafted ext4 image.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2018-1094
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-1094
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 20 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-1094
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.1
|
HIGH | AV:N/AC:M/Au:N/C:N/I:N/A:C |
8.6
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2018-1094
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-1094
-
https://usn.ubuntu.com/3695-1/
USN-3695-1: Linux kernel vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403b51582a87872927a3e0fc0a389c26867f1
kernel/git/tytso/ext4.git - Ext4 filesystem treePatch
-
https://access.redhat.com/errata/RHSA-2018:3096
RHSA-2018:3096 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:2948
RHSA-2018:2948 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2018:3083
RHSA-2018:3083 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://usn.ubuntu.com/3695-2/
USN-3695-2: Linux kernel (HWE) vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1560788
1560788 – (CVE-2018-1094) CVE-2018-1094 kernel: NULL pointer dereference in ext4/xattr.c:ext4_xattr_inode_hash() causes crash with crafted ext4 imageIssue Tracking;Third Party Advisory
-
https://bugzilla.kernel.org/show_bug.cgi?id=199183
199183 – Invalid pointer dereference in ext4_xattr_inode_hash when mounting and later operating on a crafted imageExploit;Issue Tracking
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https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4b4e6fc31eda838dd1c1296d67dbcb3dc957
kernel/git/tytso/ext4.git - Ext4 filesystem treeThird Party Advisory
-
http://openwall.com/lists/oss-security/2018/03/29/1
oss-security - a number of CVEs for issues in the filesystem's code in the Linux kernelMailing List;Third Party Advisory
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