CVE-2019-19227

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2019-19227?
CVE-2019-19227 has been scored as a medium severity vulnerability.
How to fix CVE-2019-19227?
To fix CVE-2019-19227, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-19227 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-19227 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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