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CVE-2018-18397 (GCVE-0-2018-18397)

Vulnerability from cvelistv5 – Published: 2018-12-12 07:00 – Updated: 2024-08-05 11:08
VLAI
Summary
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
Severity
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE
  • n/a
Assigner
References
URL Tags
https://usn.ubuntu.com/3903-2/ vendor-advisoryx_refsource_UBUNTU
https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan… x_refsource_MISC
https://github.com/torvalds/linux/commit/29ec9066… x_refsource_MISC
https://usn.ubuntu.com/3901-2/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:0324 vendor-advisoryx_refsource_REDHAT
https://bugs.chromium.org/p/project-zero/issues/d… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2019:0202 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:0163 vendor-advisoryx_refsource_REDHAT
http://git.kernel.org/cgit/linux/kernel/git/torva… x_refsource_MISC
https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan… x_refsource_MISC
https://usn.ubuntu.com/3901-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3903-1/ vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:0831 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHBA-2019:0327 vendor-advisoryx_refsource_REDHAT
Date Public
2018-12-12 00:00
Show details on NVD website
To clipboard 

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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.