CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NCVE-2019-18282
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.
Severity
- EPSS
- 2.9% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- CWE
- CWE-330
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- linux:linux_kernel
- netapp:8300_firmware
- netapp:8700_firmware
- netapp:a400_firmware
- netapp:a700s_firmware
- netapp:active_iq_unified_manager
- netapp:cloud_backup
- netapp:data_availability_services
- netapp:e-series_santricity_os_controller
- netapp:h610s_firmware
- netapp:hci_management_node
- netapp:solidfire
- netapp:steelstore_cloud_integrated_storage
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.10
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=55667441c84fa5e0911a0aac44fb059c15ba6da2
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://security.netapp.com/advisory/ntap-20200204-0002/
- https://www.computer.org/csdl/proceedings-article/sp/2020/349700b594/1j2LgrHDR2o