CVE-2019-18282

Description

The flow_dissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto flowlabel of a UDP IPv6 packet relies on a 32-bit hashrnd value as a secret, and because jhash (instead of siphash) is used. The hashrnd value remains the same starting from boot time, and can be inferred by an attacker. This affects net/core/flow_dissector.c and related code.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.41%
Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10 mailing list vendor advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2 mailing list patch vendor advisory
https://security.netapp.com/advisory/ntap-20200204-0002/ third party advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html third party advisory mailing list
https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-18282?
CVE-2019-18282 has been scored as a medium severity vulnerability.
How to fix CVE-2019-18282?
To fix CVE-2019-18282, 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-2019-18282 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-18282 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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