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Vulnerability Details : CVE-2018-16882

A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.
Publish Date : 2019-01-03 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
7.2
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Gain privileges
CWE ID 416

- Products Affected By CVE-2018-16882

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 18.04 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 18.10 * * * Version Details Vulnerabilities
5 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 4
Linux Linux Kernel 1

- References For CVE-2018-16882

https://usn.ubuntu.com/3878-1/
UBUNTU USN-3878-1
https://usn.ubuntu.com/3871-5/
UBUNTU USN-3871-5
https://marc.info/?l=kvm&m=154514994222809&w=2
https://lwn.net/Articles/775721/ CONFIRM
https://lwn.net/Articles/775720/ CONFIRM
https://usn.ubuntu.com/3871-1/
UBUNTU USN-3871-1
https://usn.ubuntu.com/3878-2/
UBUNTU USN-3878-2
https://usn.ubuntu.com/3871-4/
UBUNTU USN-3871-4
https://support.f5.com/csp/article/K80557033 CONFIRM
https://usn.ubuntu.com/3871-3/
UBUNTU USN-3871-3
http://www.securityfocus.com/bid/106254
BID 106254 Linux Kernel CVE-2018-16882 Local Denial of Service Vulnerability Release Date:2018-12-18
https://usn.ubuntu.com/3872-1/
UBUNTU USN-3872-1
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882 CONFIRM

- Metasploit Modules Related To CVE-2018-16882

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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