Information Exposure Affecting torvalds/linux package, versions [4.3,5.3.11)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.53% (66th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006227
  • published26 Jan 2022
  • disclosed16 Jan 2020
  • creditUnknown

Introduced: 16 Jan 2020

CVE-2019-18282  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.3.11 or higher.

Overview

Affected versions of this package are vulnerable to Information Exposure. 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.

References

CVSS Base Scores

version 3.1