CVE-2018-8897
At a glance
- Source
- NVD
- EPSS
- EPSS 18.48 % · percentile 97 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization
References
- https://github.com/torvalds/linux/commit/d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9
- http://openwall.com/lists/oss-security/2018/05/08/4
- http://www.securitytracker.com/id/1040849
- http://www.securityfocus.com/bid/104071
- https://access.redhat.com/errata/RHSA-2018:1350
- https://support.citrix.com/article/CTX234679
- https://access.redhat.com/errata/RHSA-2018:1347
- https://www.exploit-db.com/exploits/44697/
- https://lists.debian.org/debian-lts-announce/2018/05/msg00015.html
- http://www.securitytracker.com/id/1040866
- https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
- https://lists.debian.org/debian-lts-announce/2018/06/msg00000.html
- https://support.apple.com/HT208742
- https://access.redhat.com/errata/RHSA-2018:1346
- https://access.redhat.com/errata/RHSA-2018:1348
- https://access.redhat.com/errata/RHSA-2018:1354
- https://svnweb.freebsd.org/base?view=revision&revision=333368
- https://www.debian.org/security/2018/dsa-4196
- https://www.freebsd.org/security/advisories/FreeBSD-SA-18:06.debugreg.asc
- http://www.securitytracker.com/id/1040744
- https://www.triplefault.io/2018/05/spurious-db-exceptions-with-pop-ss.html
- https://access.redhat.com/errata/RHSA-2018:1351
- https://bugzilla.redhat.com/show_bug.cgi?id=1567074
- https://xenbits.xen.org/xsa/advisory-260.html
- https://access.redhat.com/errata/RHSA-2018:1319
- https://www.debian.org/security/2018/dsa-4201
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- https://access.redhat.com/errata/RHSA-2018:1355
- https://security.netapp.com/advisory/ntap-20180927-0002/
- https://access.redhat.com/errata/RHSA-2018:1345
- https://www.exploit-db.com/exploits/45024/
- https://access.redhat.com/errata/RHSA-2018:1349
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8897
- https://access.redhat.com/errata/RHSA-2018:1352
- https://access.redhat.com/errata/RHSA-2018:1318
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9
- https://patchwork.kernel.org/patch/10386677/
- https://www.kb.cert.org/vuls/id/631579
- https://github.com/can1357/CVE-2018-8897/
- https://access.redhat.com/errata/RHSA-2018:1524
- http://openwall.com/lists/oss-security/2018/05/08/1
- http://www.securitytracker.com/id/1040861
- https://access.redhat.com/errata/RHSA-2018:1353
- https://usn.ubuntu.com/3641-2/
- https://www.synology.com/support/security/Synology_SA_18_21
- http://www.securitytracker.com/id/1040882
- https://usn.ubuntu.com/3641-1/
- http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190921-01-debug-en
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | HIGH 7.8 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | HIGH 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2018-20505
- GCVE · GCVE-0-2018-8897
CERT-FR advisories
- CERTFR-2019-AVI-014 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2018-AVI-584 — Multiples vulnérabilités dans IBM QRadar SIEM · cert.ssi.gouv.fr
- CERTFR-2018-AVI-505 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2018-AVI-330 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2018-AVI-275 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2018-AVI-268 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2018-AVI-266 — Multiples vulnérabilités dans les produits Apple · cert.ssi.gouv.fr
- CERTFR-2018-AVI-232 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2018-AVI-229 — Multiples vulnérabilités dans Xen · cert.ssi.gouv.fr
- CERTFR-2018-AVI-228 — Multiples vulnérabilités dans le noyau Linux de RedHat · cert.ssi.gouv.fr
- CERTFR-2018-AVI-226 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2018-AVI-225 — Multiples vulnérabilités dans Citrix XenServer · cert.ssi.gouv.fr
- CERTFR-2018-AVI-224 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2018-AVI-221 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_virtualization_manager:3.0:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:7.1:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:7.2:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:7.3:*:*:*:*:*:*:*cpe:2.3:a:citrix:xenserver:7.4:*:*:*:*:*:*:*cpe:2.3:a:synology:skynas:-:*:*:*:*:*:*:*cpe:2.3:o:synology:diskstation_manager:5.2:*:*:*:*:*:*:*cpe:2.3:o:synology:diskstation_manager:6.0:*:*:*:*:*:*:*cpe:2.3:o:synology:diskstation_manager:6.1:*:*:*:*:*:*:*cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*< 10.13.4cpe:2.3:o:xen:xen:-:*:*:*:*:*:x86:*cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*≥ 11.0 < 11.1
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |