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CVE-2018-18397 Detail

Description

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1 Patch  Third Party Advisory 
https://access.redhat.com/errata/RHBA-2019:0327 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:0163 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:0202 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:0324 Third Party Advisory 
https://access.redhat.com/errata/RHSA-2019:0831 Third Party Advisory 
https://bugs.chromium.org/p/project-zero/issues/detail?id=1700 Exploit  Issue Tracking  Third Party Advisory 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87 Patch  Vendor Advisory 
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7 Patch  Vendor Advisory 
https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1 Patch  Third Party Advisory 
https://usn.ubuntu.com/3901-1/ Third Party Advisory 
https://usn.ubuntu.com/3901-2/ Third Party Advisory 
https://usn.ubuntu.com/3903-1/ Third Party Advisory 
https://usn.ubuntu.com/3903-2/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-863 Incorrect Authorization cwe source acceptance level NIST  

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Change History

13 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-18397
NVD Published Date:
12/12/2018
NVD Last Modified:
08/24/2020
Source:
MITRE