CVE-2017-12192

medium

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.

References

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/

Details

Source: MITRE

Published: 2017-10-12

Updated: 2018-03-16

Type: CWE-476

Risk Information

CVSS v2

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM