Messages in this thread | | | From | Dison River <> | Date | Tue, 4 Jul 2017 13:12:18 +0800 | Subject | 'skb' buffer address information leakage |
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Hi all: I'd found several address leaks of "skb" buffer.When i have a arbitrary address write vulnerability in kernel(enabled kASLR),I can use skb's address find sk_destruct's address and overwrite it. And then,invoke close(sock_fd) function can trigger the shellcode(sk_destruct func).
In kernel 4.12-rc7 drivers/net/irda/vlsi_ir.c:326 seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c:167 seq_printf(file, " frag=%p", skb); drivers/net/wireless/ath/wil6210/debugfs.c:926 seq_printf(s, " SKB = 0x%p\n", skb);
Thanks.
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