CVE-2018-18653 — HIGH (7.8)

Vulnerability Description

The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure Boot enabled, allows privileged local users to bypass intended Secure Boot restrictions and execute untrusted code by loading arbitrary kernel modules. This occurs because a modified kernel/module.c, in conjunction with certain configuration options, leads to mishandling of the result of signature verification.

CVSS Score

7.8

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Canonical	Ubuntu Linux	18.10

Related Weaknesses (CWE)

CWE-347

References

https://launchpad.net/bugs/1798863ExploitIssue TrackingVendor Advisory
https://usn.ubuntu.com/3832-1/PatchVendor Advisory
https://usn.ubuntu.com/3835-1/PatchVendor Advisory
https://launchpad.net/bugs/1798863ExploitIssue TrackingVendor Advisory
https://usn.ubuntu.com/3832-1/PatchVendor Advisory
https://usn.ubuntu.com/3835-1/PatchVendor Advisory

FAQ

What is CVE-2018-18653?

CVE-2018-18653 is a vulnerability with a CVSS score of 7.8 (HIGH). The Linux kernel, as used in Ubuntu 18.10 and when booted with UEFI Secure Boot enabled, allows privileged local users to bypass intended Secure Boot restrictions and execute untrusted code by loading...

How severe is CVE-2018-18653?

CVE-2018-18653 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2018-18653?

Check the references section above for vendor advisories and patch information. Affected products include: Canonical Ubuntu Linux.