CVE-2018-8897 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9 Patch  Third Party Advisory 
http://openwall.com/lists/oss-security/2018/05/08/1 Mailing List  Third Party Advisory 
http://openwall.com/lists/oss-security/2018/05/08/4 Mailing List  Third Party Advisory 
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190921-01-debug-en
http://www.securityfocus.com/bid/104071 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1040744 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1040849 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1040861 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1040866 Third Party Advisory  VDB Entry 
http://www.securitytracker.com/id/1040882 Third Party Advisory  VDB Entry 
https://access.redhat.com/errata/RHSA-2018:1318 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1319 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1345 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1346 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1347 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1348 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1349 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1350 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1351 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1352 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1353 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1354 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1355 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2018:1524 Third Party Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=1567074 Issue Tracking  Third Party Advisory 
https://github.com/can1357/CVE-2018-8897/ Exploit  Third Party Advisory 
https://github.com/torvalds/linux/commit/d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9 Patch  Third Party Advisory 
https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
https://lists.debian.org/debian-lts-announce/2018/05/msg00015.html Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
https://patchwork.kernel.org/patch/10386677/ Patch  Third Party Advisory 
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8897 Patch  Third Party Advisory  Vendor Advisory 
https://security.netapp.com/advisory/ntap-20180927-0002/
https://support.apple.com/HT208742 Third Party Advisory 
https://support.citrix.com/article/CTX234679 Third Party Advisory 
https://svnweb.freebsd.org/base?view=revision&revision=333368 Third Party Advisory 
https://usn.ubuntu.com/3641-1/ Third Party Advisory 
https://usn.ubuntu.com/3641-2/ Third Party Advisory 
https://www.debian.org/security/2018/dsa-4196 Third Party Advisory 
https://www.debian.org/security/2018/dsa-4201 Third Party Advisory 
https://www.exploit-db.com/exploits/44697/ Exploit  Third Party Advisory  VDB Entry 
https://www.exploit-db.com/exploits/45024/
https://www.freebsd.org/security/advisories/FreeBSD-SA-18:06.debugreg.asc Third Party Advisory 
https://www.kb.cert.org/vuls/id/631579
https://www.synology.com/support/security/Synology_SA_18_21 Third Party Advisory 
https://www.triplefault.io/2018/05/spurious-db-exceptions-with-pop-ss.html Third Party Advisory 
https://xenbits.xen.org/xsa/advisory-260.html Patch  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

18 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-8897
NVD Published Date:
05/08/2018
NVD Last Modified:
10/02/2019
Source:
MITRE