CVE-2019-19227 Information

Description

In the AppleTalk subsystem in the Linux kernel before 5.1 there is a potential NULL pointer dereference because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c and net/appletalk/ddp.c as demonstrated by unregister_snap_client aka CID-9804501fa122.

CVSS Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9804501fa1228048857910a6bf23e085aade37cc https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html https://seclists.org/bugtraq/2020/Jan/10 https://security.netapp.com/advisory/ntap-20200103-0001/ https://usn.ubuntu.com/4254-1/ https://usn.ubuntu.com/4254-2/ https://usn.ubuntu.com/4258-1/ https://usn.ubuntu.com/4287-1/ https://usn.ubuntu.com/4287-2/

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