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Vulnerability Details : CVE-2018-1087

kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.
Publish Date : 2018-05-15 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
4.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
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)
CWE ID CWE id is not defined for this vulnerability

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2018:1318: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20181318 unix
RHSA-2018:1345: kernel security update (Important) oval:com.redhat.rhsa:def:20181345 unix
RHSA-2018:1355: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20181355 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2018-1087

# Product Type Vendor Product Version Update Edition Language
1 OS Canonical Ubuntu Linux 14.04 ~~lts~~~ Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 16.04 ~~lts~~~ Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 17.10 Version Details Vulnerabilities
4 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
5 OS Debian Debian Linux 9.0 Version Details Vulnerabilities
6 OS Linux Linux Kernel 4.16 Version Details Vulnerabilities
7 OS Linux Linux Kernel 4.16 RC7 Version Details Vulnerabilities
8 OS Linux Linux Kernel 4.17 RC3 Version Details Vulnerabilities
9 OS Linux Linux Kernel 4.17 RC1 Version Details Vulnerabilities
10 OS Linux Linux Kernel 4.17 RC2 Version Details Vulnerabilities
11 OS Redhat Enterprise Linux 7.0 Version Details Vulnerabilities
12 OS Redhat Enterprise Linux Desktop 7.0 Version Details Vulnerabilities
13 OS Redhat Enterprise Linux Server 7.0 Version Details Vulnerabilities
14 OS Redhat Enterprise Linux Server Aus 7.2 Version Details Vulnerabilities
15 OS Redhat Enterprise Linux Server Aus 7.3 Version Details Vulnerabilities
16 OS Redhat Enterprise Linux Server Aus 7.4 Version Details Vulnerabilities
17 OS Redhat Enterprise Linux Server Eus 7.3 Version Details Vulnerabilities
18 OS Redhat Enterprise Linux Server Eus 7.4 Version Details Vulnerabilities
19 OS Redhat Enterprise Linux Server Eus 7.5 Version Details Vulnerabilities
20 OS Redhat Enterprise Linux Server Tus 7.2 Version Details Vulnerabilities
21 OS Redhat Enterprise Linux Server Tus 7.3 Version Details Vulnerabilities
22 OS Redhat Enterprise Linux Server Tus 7.4 Version Details Vulnerabilities
23 OS Redhat Enterprise Linux Virtualization 4.0 Version Details Vulnerabilities
24 OS Redhat Enterprise Linux Workstation 7.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Canonical Ubuntu Linux 3
Debian Debian Linux 2
Linux Linux Kernel 5
Redhat Enterprise Linux 1
Redhat Enterprise Linux Desktop 1
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Server Aus 3
Redhat Enterprise Linux Server Eus 3
Redhat Enterprise Linux Server Tus 3
Redhat Enterprise Linux Virtualization 1
Redhat Enterprise Linux Workstation 1

- References For CVE-2018-1087

https://usn.ubuntu.com/3641-2/
UBUNTU USN-3641-2
https://usn.ubuntu.com/3641-1/
UBUNTU USN-3641-1
https://access.redhat.com/security/vulnerabilities/pop_ss
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1087 CONFIRM
https://access.redhat.com/errata/RHSA-2018:1348
REDHAT RHSA-2018:1348
https://access.redhat.com/errata/RHSA-2018:1355
REDHAT RHSA-2018:1355
https://access.redhat.com/errata/RHSA-2018:1524
REDHAT RHSA-2018:1524
https://access.redhat.com/errata/RHSA-2018:1347
REDHAT RHSA-2018:1347
https://access.redhat.com/errata/RHSA-2018:1345
REDHAT RHSA-2018:1345
https://access.redhat.com/errata/RHSA-2018:1318
REDHAT RHSA-2018:1318
http://www.openwall.com/lists/oss-security/2018/05/08/5
http://www.securitytracker.com/id/1040862
SECTRACK 1040862
http://www.securityfocus.com/bid/104127
BID 104127 Linux Kernel CVE-2018-1087 Local Privilege Escalation Vulnerability Release Date:2019-02-08
https://www.debian.org/security/2018/dsa-4196
DEBIAN DSA-4196

- Metasploit Modules Related To CVE-2018-1087

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


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