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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History
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MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2020-01-16T15:22:58
Updated: 2024-08-05T01:47:14.161Z
Reserved: 2019-10-23T00:00:00
Link: CVE-2019-18282
Vulnrichment
No data.
NVD
Status : Modified
Published: 2020-01-16T16:15:16.950
Modified: 2024-11-21T04:32:58.140
Link: CVE-2019-18282
Redhat