CVE-2019-15792 Information

Description

In shiftfs a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series shiftfs_btrfs_ioctl_fd_replace() calls fdget(oldfd) then without further checks passes the resulting file* into shiftfs_real_fdget() which casts file-private_data a void* that points to a filesystem-dependent type to a \struct shiftfs_file_info *. As the private_data is not required to be a pointer an attacker can use this to cause a denial of service or possibly execute arbitrary code.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=5df147c8140efc71ac0879ae3b0057f577226d4c https://usn.ubuntu.com/usn/usn-4183-1 https://usn.ubuntu.com/usn/usn-4184-1

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8