Information Exposure Affecting kernel-rt-devel package, versions <0:3.10.0-1160.11.1.rt56.1145.el7


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.25% (66th percentile)

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  • Snyk IDSNYK-CENTOS7-KERNELRTDEVEL-2182547
  • published26 Jul 2021
  • disclosed22 Oct 2019

Introduced: 22 Oct 2019

CVE-2019-18282  (opens in a new tab)
CWE-200  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade Centos:7 kernel-rt-devel to version 0:3.10.0-1160.11.1.rt56.1145.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-devel package and not the kernel-rt-devel package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

CVSS Scores

version 3.1