CVE-2017-12192 Information

Description

The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678 http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 https://access.redhat.com/errata/RHSA-2018:0151 https://bugzilla.redhat.com/show_bug.cgi?id=1493435 https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678 https://lkml.org/lkml/2017/9/18/764 https://usn.ubuntu.com/3583-1/ https://usn.ubuntu.com/3583-2/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5