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.
History

No history.

cve-icon 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

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2020-01-16T16:15:16.950

Modified: 2022-04-18T15:48:24.223

Link: CVE-2019-18282

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-10-22T00:00:00Z

Links: CVE-2019-18282 - Bugzilla