Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbmod: Skip non-Ethernet packets Currently tcf_skbmod_act() assumes that packets use Ethernet as their L2 protocol, which is not always the case. As an example, for CAN devices: $ ip link add dev vcan0 type vcan $ ip link set up vcan0 $ tc qdisc add dev vcan0 root handle 1: htb $ tc filter add dev vcan0 parent 1: protocol ip prio 10 \ matchall action skbmod swap mac Doing the above silently corrupts all the packets. Do not perform skbmod actions for non-Ethernet packets.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
86da71b57383d40993cb90baafb3735cffe5d800 to < e4fdca366806f6bab374d1a95e626a10a3854b0caffected86da71b57383d40993cb90baafb3735cffe5d800 to < a88414fb1117f2fe65fb88e45ba694e1d09d5024affected86da71b57383d40993cb90baafb3735cffe5d800 to < 071729150be9e1d1b851b70efb6d91ee9269d57baffected86da71b57383d40993cb90baafb3735cffe5d800 to < 34f1e1f657fae2891b485a3b2b95fe4d2aef9f0daffected86da71b57383d40993cb90baafb3735cffe5d800 to < 727d6a8b7ef3d25080fad228b2c4a1d4da5999c6affected
Linux Linux
Default version status: affected
4.9affected0 to < 4.9unaffected4.19.199 to ≤ 4.19.*unaffected5.4.136 to ≤ 5.4.*unaffected5.10.54 to ≤ 5.10.*unaffected5.13.6 to ≤ 5.13.*unaffected5.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/e4fdca366806f6bab374d1a95e626a10a3854b0c ↗
- https://git.kernel.org/stable/c/a88414fb1117f2fe65fb88e45ba694e1d09d5024 ↗
- https://git.kernel.org/stable/c/071729150be9e1d1b851b70efb6d91ee9269d57b ↗
- https://git.kernel.org/stable/c/34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d ↗
- https://git.kernel.org/stable/c/727d6a8b7ef3d25080fad228b2c4a1d4da5999c6 ↗