Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() `ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`. Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing `eth_hdr(skb)`.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
High
Affected products
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 4435888e1bf139d2bfe5911643d4217382136743
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 063f43361e884acd7300790e90194430275d0d0c
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 726abf97566867f808fec9d8a408eb9698bd570a
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 367abcacc13a8e2e7624408b7f593bd1e60e49d9
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 5d634afb8b83b49de562792fd0d047416a43bd4d
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – cea435ea7e868ea6fdf039bc4f2090c1d829b556
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 62443dc21114c0bbc476fa62973db89743f2f137
- Linux / Linux0 – 5.15.210
- Linux / Linux0 – 6.1.176
- Linux / Linux0 – 6.6.143
- Linux / Linux0 – 6.12.94
- Linux / Linux0 – 6.18.36
- Linux / Linux0 – 7.0.13
- Linux / Linux5.15.210 – 5.15.*
- Linux / Linux6.1.176 – 6.1.*
- Linux / Linux6.6.143 – 6.6.*
- Linux / Linux6.12.94 – 6.12.*
- Linux / Linux6.18.36 – 6.18.*
- Linux / Linux7.0.13 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743
- MISChttps://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c
- MISChttps://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570a
- MISChttps://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9
- MISChttps://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d
- MISChttps://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556
- MISChttps://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137