CVE-2018-8897
Vulnerability from cvelistv5
Published
2018-05-08 18:00
Modified
2024-08-05 07:10
Severity ?
Summary
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.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9Patch, Third Party Advisory
cve@mitre.orghttp://openwall.com/lists/oss-security/2018/05/08/1Mailing List, Third Party Advisory
cve@mitre.orghttp://openwall.com/lists/oss-security/2018/05/08/4Mailing List, Third Party Advisory
cve@mitre.orghttp://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190921-01-debug-en
cve@mitre.orghttp://www.securityfocus.com/bid/104071Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1040744Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1040849Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1040861Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1040866Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1040882Third Party Advisory, VDB Entry
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1318Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1319Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1345Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1346Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1347Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1348Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1349Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1350Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1351Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1352Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1353Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1354Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1355Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:1524Third Party Advisory
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1567074Issue Tracking, Third Party Advisory
cve@mitre.orghttps://github.com/can1357/CVE-2018-8897/Exploit, Third Party Advisory
cve@mitre.orghttps://github.com/torvalds/linux/commit/d8ba61ba58c88d5207c1ba2f7d9a2280e7d03be9Patch, Third Party Advisory
cve@mitre.orghttps://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2018/05/msg00015.htmlThird Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2018/06/msg00000.htmlThird Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
cve@mitre.orghttps://patchwork.kernel.org/patch/10386677/Patch, Third Party Advisory
cve@mitre.orghttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8897Patch, Third Party Advisory, Vendor Advisory
cve@mitre.orghttps://security.netapp.com/advisory/ntap-20180927-0002/
cve@mitre.orghttps://support.apple.com/HT208742Third Party Advisory
cve@mitre.orghttps://support.citrix.com/article/CTX234679Third Party Advisory
cve@mitre.orghttps://svnweb.freebsd.org/base?view=revision&revision=333368Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3641-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3641-2/Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2018/dsa-4196Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2018/dsa-4201Third Party Advisory
cve@mitre.orghttps://www.exploit-db.com/exploits/44697/Exploit, Third Party Advisory, VDB Entry
cve@mitre.orghttps://www.exploit-db.com/exploits/45024/
cve@mitre.orghttps://www.freebsd.org/security/advisories/FreeBSD-SA-18:06.debugreg.ascThird Party Advisory
cve@mitre.orghttps://www.kb.cert.org/vuls/id/631579
cve@mitre.orghttps://www.synology.com/support/security/Synology_SA_18_21Third Party Advisory
cve@mitre.orghttps://www.triplefault.io/2018/05/spurious-db-exceptions-with-pop-ss.htmlThird Party Advisory
cve@mitre.orghttps://xenbits.xen.org/xsa/advisory-260.htmlPatch, Third Party Advisory
Impacted products
n/an/a
Show details on NVD website

To clipboard 

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OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.\"},{\"lang\":\"es\",\"value\":\"Una declaraci\u00f3n en la gu\u00eda de programaci\u00f3n de sistemas del Manual del desarrollador de software (SDM) de las arquitecturas Intel 64 e IA-32 se manej\u00f3 incorrectamente en el desarrollo de algunos o todos los n\u00facleos del sistema operativo, lo que provoc\u00f3 un comportamiento inesperado para las excepciones #DB que son diferidas por MOV SS o POP SS, tal y como queda demostrado con (por ejemplo) el escalado de privilegios en Windows, macOS, algunas configuraciones Xen o FreeBSD, o un fallo del kernel de Linux. Las instrucciones de MOV a SS y POP SS inhiben interrupciones (incluyendo NMI), puntos de interrupci\u00f3n de datos y excepciones de trampas de un paso hasta los l\u00edmites de la instrucci\u00f3n que siguen a la siguiente instrucci\u00f3n (SDM Vol. 3A; secci\u00f3n 6.8.3). (Los puntos de interrupci\u00f3n de datos inhibidos son aquellos en la memoria a los que accede a la propia instrucci\u00f3n MOV a SS o POP a SS). Tenga en cuenta que las excepciones de depuraci\u00f3n no est\u00e1n inhibidas por el indicador del sistema de habilitaci\u00f3n de interrupciones (EFLAGS.IF) (SDM Vol. 3A; secci\u00f3n 2.3). Si la instrucci\u00f3n que sigue a la instrucci\u00f3n MOV a SS o POP a SS es una instrucci\u00f3n como SYSCALL, SYSENTER, INT 3, etc. que transfiere el control al sistema operativo a CPL \u003c 3, la excepci\u00f3n de depuraci\u00f3n se entrega despu\u00e9s de que la transferencia a CPL \u003c 3 se haya completado. Es posible que los kernels del sistema operativo no esperen este orden de eventos y, por lo tanto, puedan experimentar un comportamiento inesperado cuando 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  }
}


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