CVE-2017-18344
Vulnerability from cvelistv5
Published
2018-07-26 19:00
Modified
2024-08-05 21:20
Severity ?
Summary
The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).
References
cve@mitre.orghttp://www.securityfocus.com/bid/104909Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.securitytracker.com/id/1041414Third Party Advisory, VDB Entry
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3459Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3540Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3586Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3590Third Party Advisory
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:3591Third Party Advisory
cve@mitre.orghttps://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8Third Party Advisory
cve@mitre.orghttps://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbePatch, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3742-1/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3742-2/Third Party Advisory
cve@mitre.orghttps://www.exploit-db.com/exploits/45175/Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/104909Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1041414Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3459Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3540Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3586Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3590Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:3591Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbePatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3742-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3742-2/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/45175/Exploit, Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
Show details on NVD website

To clipboard 

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This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).\"},{\"lang\":\"es\",\"value\":\"La implementaci\u00f3n de llamada del sistema timer_create en kernel/time/posix-timers.c en el kernel de Linux en versiones anteriores a la 4.14.8 no valida correctamente el campo sigevent-\u003esigev_notify, conduciendo a un acceso fuera de l\u00edmites en la funci\u00f3n show_timer (que se llama cuando se lee /proc/$PID/timers). Esto permite que las aplicaciones del espacio del usuario lean memoria del kernel arbitraria (en un kernel construido con CONFIG_POSIX_TIMERS y 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  }
}


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