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.
CPE | Name | Operator | Version |
---|---|---|---|
debian_linux | eq | 8.0 | |
linux_kernel | ge | 4.3 | |
linux_kernel | le | 5.3.10 | |
e-series_santricity_os_controller | ge | 11.0.0 | |
e-series_santricity_os_controller | le | 11.70.1 |
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10
git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2
lists.debian.org/debian-lts-announce/2020/03/msg00001.html
security.netapp.com/advisory/ntap-20200204-0002/
www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o