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Vulnerability Details : CVE-2018-8897

A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.
Publish Date : 2018-05-08 Last Update Date : 2019-10-03
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- CVSS Scores & Vulnerability Types

CVSS Score
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)
CWE ID 362

- 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-2018:1319: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20181319 unix
RHSA-2018:1345: kernel security update (Important) oval:com.redhat.rhsa:def:20181345 unix
RHSA-2018:1353: kernel security update (Moderate) oval:com.redhat.rhsa:def:20181353 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-2018-8897

# Product Type Vendor Product Version Update Edition Language
1 OS Apple Mac Os X * * * * Version Details Vulnerabilities
2 OS Canonical Ubuntu Linux 14.04 * * * Version Details Vulnerabilities
3 OS Canonical Ubuntu Linux 16.04 * * * Version Details Vulnerabilities
4 OS Canonical Ubuntu Linux 17.10 * * * Version Details Vulnerabilities
5 Application Citrix Xenserver 6.0.2 * * * Version Details Vulnerabilities
6 Application Citrix Xenserver 6.2.0 * * * Version Details Vulnerabilities
7 Application Citrix Xenserver 6.5 * * * Version Details Vulnerabilities
8 Application Citrix Xenserver 7.0 * * * Version Details Vulnerabilities
9 Application Citrix Xenserver 7.1 * * * Version Details Vulnerabilities
10 Application Citrix Xenserver 7.2 * * * Version Details Vulnerabilities
11 Application Citrix Xenserver 7.3 * * * Version Details Vulnerabilities
12 Application Citrix Xenserver 7.4 * * * Version Details Vulnerabilities
13 OS Debian Debian Linux 7.0 * * * Version Details Vulnerabilities
14 OS Debian Debian Linux 8.0 * * * Version Details Vulnerabilities
15 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
16 OS Freebsd Freebsd * * * * Version Details Vulnerabilities
17 OS Redhat Enterprise Linux Server 7.0 * * * Version Details Vulnerabilities
18 OS Redhat Enterprise Linux Workstation 7.0 * * * Version Details Vulnerabilities
19 OS Redhat Enterprise Virtualization Manager 3.0 * * * Version Details Vulnerabilities
20 OS Synology Diskstation Manager 5.2 * * * Version Details Vulnerabilities
21 OS Synology Diskstation Manager 6.0 * * * Version Details Vulnerabilities
22 OS Synology Diskstation Manager 6.1 * * * Version Details Vulnerabilities
23 Application Synology Skynas - * * * Version Details Vulnerabilities
24 OS XEN XEN - * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Apple Mac Os X 1
Canonical Ubuntu Linux 3
Citrix Xenserver 8
Debian Debian Linux 3
Freebsd Freebsd 1
Redhat Enterprise Linux Server 1
Redhat Enterprise Linux Workstation 1
Redhat Enterprise Virtualization Manager 1
Synology Diskstation Manager 3
Synology Skynas 1

- References For CVE-2018-8897
REDHAT RHSA-2018:1355
REDHAT RHSA-2018:1354
MLIST [debian-lts-announce] 20181112 [SECURITY] [DLA 1577-1] xen security update CONFIRM
MLIST [debian-lts-announce] 20180601 [SECURITY] [DLA 1392-1] linux security update
MLIST [debian-lts-announce] 20180525 [SECURITY] [DLA 1383-1] xen security update
REDHAT RHSA-2018:1524
SECTRACK 1040744
SECTRACK 1040882
SECTRACK 1040849
BID 104071 Microsoft Windows Kernel CVE-2018-8897 Local Privilege Escalation Vulnerability Release Date:2018-05-17
REDHAT RHSA-2018:1318
REDHAT RHSA-2018:1319
REDHAT RHSA-2018:1348
REDHAT RHSA-2018:1346
REDHAT RHSA-2018:1345
REDHAT RHSA-2018:1352
REDHAT RHSA-2018:1349
REDHAT RHSA-2018:1351
SECTRACK 1040866
REDHAT RHSA-2018:1350
SECTRACK 1040861
CERT-VN VU#631579

- Metasploit Modules Related To CVE-2018-8897

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

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