CVE-2017-18344 (GCVE-0-2017-18344)

Vulnerability from cvelistv5 – Published: 2018-07-26 19:00 – Updated: 2024-08-05 21:20
VLAI?
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).
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2018:3540 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:3083 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:3591 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:3459 vendor-advisoryx_refsource_REDHAT
http://www.securitytracker.com/id/1041414 vdb-entryx_refsource_SECTRACK
https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2018:3590 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:2948 vendor-advisoryx_refsource_REDHAT
https://github.com/torvalds/linux/commit/cef31d9a… x_refsource_MISC
https://usn.ubuntu.com/3742-2/ vendor-advisoryx_refsource_UBUNTU
http://www.securityfocus.com/bid/104909 vdb-entryx_refsource_BID
https://usn.ubuntu.com/3742-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:3586 vendor-advisoryx_refsource_REDHAT
https://www.exploit-db.com/exploits/45175/ exploitx_refsource_EXPLOIT-DB
https://access.redhat.com/errata/RHSA-2018:3096 vendor-advisoryx_refsource_REDHAT
Date Public ?
2018-07-26 00:00
Show details on NVD website
To clipboard 

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      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-125\"}]}]"
    },
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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). 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  }
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.