Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.15.15 |
| Canonical | Ubuntu Linux | 16.04 |
| Redhat | Enterprise Linux Desktop | 7.0 |
| Redhat | Enterprise Linux Server | 7.0 |
| Redhat | Enterprise Linux Workstation | 7.0 |
Related Weaknesses (CWE)
References
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=199183ExploitIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1560788Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4bThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403Patch
- https://usn.ubuntu.com/3695-1/Third Party Advisory
- https://usn.ubuntu.com/3695-2/Third Party Advisory
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
- https://bugzilla.kernel.org/show_bug.cgi?id=199183ExploitIssue Tracking
FAQ
What is CVE-2018-1094?
CVE-2018-1094 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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_xat...
How severe is CVE-2018-1094?
CVE-2018-1094 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-1094?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.