CVE-2018-18397
CVE-2018-18397
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.
Productos afectados
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Hablar con TrueHacking →Referencias
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1https://access.redhat.com/errata/RHBA-2019:0327https://access.redhat.com/errata/RHSA-2019:0163https://access.redhat.com/errata/RHSA-2019:0202https://access.redhat.com/errata/RHSA-2019:0324https://access.redhat.com/errata/RHSA-2019:0831https://bugs.chromium.org/p/project-zero/issues/detail?id=1700https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1https://usn.ubuntu.com/3901-1/https://usn.ubuntu.com/3901-2/