CVE-2018-14619

HIGH

Description

A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The "null skcipher" was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.

References

http://www.securityfocus.com/bid/105200

https://access.redhat.com/errata/RHSA-2018:2948

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14619

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b32a7dc8aef1882fbf983eb354837488cc9d54dc

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0013

Details

Source: MITRE

Published: 2018-08-30

Updated: 2019-10-09

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 7.2

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

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH