Security Advisory

CVE-2019-18282

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2020-01-16 15:22:58

Last updated 2024-08-05 01:47:14

Assigner mitre

State PUBLISHED

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.

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