CVE-2018-12896 (GCVE-0-2018-12896)

Vulnerability from cvelistv5 – Published: 2018-07-02 17:00 – Updated: 2024-08-05 08:45
VLAI?
Summary
An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
URL Tags
https://bugzilla.kernel.org/show_bug.cgi?id=200189 x_refsource_MISC
https://usn.ubuntu.com/3848-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3847-1/ vendor-advisoryx_refsource_UBUNTU
https://github.com/torvalds/linux/commit/78c9c4df… x_refsource_MISC
https://usn.ubuntu.com/3847-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3849-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3849-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3848-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3847-3/ vendor-advisoryx_refsource_UBUNTU
https://github.com/lcytxw/bug_repro/tree/master/b… x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
Date Public ?
2018-07-02 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-190\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-12896\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2018-07-02T17:29:00.660\",\"lastModified\":\"2024-11-21T03:46:03.597\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.\"},{\"lang\":\"es\",\"value\":\"Se ha descubierto un problema en el kernel de Linux hasta la versi\u00f3n 4.17.3. Un desbordamiento de enteros en kernel/time/posix-timers.c en el c\u00f3digo temporizador POSIX es causado por la forma en que funciona la contabilidad de desbordamiento. Dependiendo de los valores del intervalo y del tiempo de expiraci\u00f3n, el desbordamiento puede ser mayor que INT_MAX, pero la contabilidad est\u00e1 basada en int. Esto b\u00e1sicamente hace que los valores contables, que son visibles para el espacio de usuario a trav\u00e9s de timer_getoverrun(2) y siginfo::si_overrun, sean aleatorios. Por ejemplo, un usuario local puede causar una denegaci\u00f3n de servicio (desbordamiento de enteros firmados) a trav\u00e9s de llamadas al sistema mmap, futex, timer_create y timer_settime 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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.