CVE-2019-18282

NameCVE-2019-18282
DescriptionThe 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2114-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)stretch4.9.210-1fixed
stretch (security)4.9.210-1+deb9u1fixed
buster4.19.118-2fixed
buster (security)4.19.118-2+deb10u1fixed
bullseye, sid5.7.6-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)5.3.15-1
linuxsourcebuster4.19.87-1
linuxsourcejessie(not affected)
linuxsourcestretch4.9.210-1
linux-4.9sourcejessie4.9.210-1~deb8u1DLA-2114-1

Notes

[jessie] - linux <not-affected> (Vulnerability introduced later)
https://git.kernel.org/linus/55667441c84fa5e0911a0aac44fb059c15ba6da2

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