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CVE-2019-18282

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.


Affected Package


OS OS Version Package Name Package Version
Debian 12 linux 5.3.15-1
Debian 11 linux 5.3.15-1
Debian 10 linux 4.19.87-1
Debian 999 linux 5.3.15-1

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