Bugzilla – Bug 1182623
VUL-0: CVE-2021-27862: kernel-source: Bypass using 802.3 headers
Last modified: 2023-01-09 14:56:52 UTC
*** Bug 1203837 has been marked as a duplicate of this bug. ***
Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed
using LLC/SNAP headers with invalid length and Ethernet to Wifi frame conversion
(and optionally VLAN0 headers).
Denis, any progress on this bug?
Through a quick glance, it's not clear whether any relevant upstream fix is present -- or whether we would need any fix, above all, though...
As I'm reading comment 2, Linux is affected by this problem when it acts as a router between ethernet and WiFi. Not a common usecase of our product but perhaps possible. No sure if there are any fixes for this though... Denis can you have a look and tell us whether there's something to fix for us?