Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:netfilter: br_netfilter: skip conntrack input hook for promisc packetsFor historical reasons, when bridge device is in promisc mode, packetsthat are directed to the taps follow bridge input hook path. This patchadds a workaround to reset conntrack for these packets.Jianbo Liu reports warning splats in their test infrastructure wherecloned packets reach the br_netfilter input hook to confirm theconntrack object.Scratch one bit from BR_INPUT_SKB_CB to annotate that this packet hasreached the input hook because it is passed up to the bridge device toreach the taps.[ 57.571874] WARNING: CPU: 1 PID: 0 at net/bridge/br_netfilter_hooks.c:616 br_nf_local_in+0x157/0x180 [br_netfilter][ 57.572749] Modules linked in: xt_MASQUERADE nf_conntrack_netlink nfnetlink iptable_nat xt_addrtype xt_conntrack nf_nat br_netfilter rpcsec_gss_krb5 auth_rpcgss oid_registry overlay rpcrdma rdma_ucm ib_iser libiscsi scsi_transport_isc si ib_umad rdma_cm ib_ipoib iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5ctl mlx5_core[ 57.575158] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0+ #19[ 57.575700] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014[ 57.576662] RIP: 0010:br_nf_local_in+0x157/0x180 [br_netfilter][ 57.577195] Code: fe ff ff 41 bd 04 00 00 00 be 04 00 00 00 e9 4a ff ff ff be 04 00 00 00 48 89 ef e8 f3 a9 3c e1 66 83 ad b4 00 00 00 04 eb 91 <0f> 0b e9 f1 fe ff ff 0f 0b e9 df fe ff ff 48 89 df e8 b3 53 47 e1[ 57.578722] RSP: 0018:ffff88885f845a08 EFLAGS: 00010202[ 57.579207] RAX: 0000000000000002 RBX: ffff88812dfe8000 RCX: 0000000000000000[ 57.579830] RDX: ffff88885f845a60 RSI: ffff8881022dc300 RDI: 0000000000000000[ 57.580454] RBP: ffff88885f845a60 R08: 0000000000000001 R09: 0000000000000003[ 57.581076] R10: 00000000ffff1300 R11: 0000000000000002 R12: 0000000000000000[ 57.581695] R13: ffff8881047ffe00 R14: ffff888108dbee00 R15: ffff88814519b800[ 57.582313] FS: 0000000000000000(0000) GS:ffff88885f840000(0000) knlGS:0000000000000000[ 57.583040] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033[ 57.583564] CR2: 000000c4206aa000 CR3: 0000000103847001 CR4: 0000000000370eb0[ 57.584194] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000[ 57.584820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:0000000000000400[ 57.585440] Call Trace:[ 57.585721]
No PoCs from references.
- https://github.com/fkie-cad/nvd-json-data-feeds