Messages in this thread Patch in this message | | | Date | Thu, 12 Jan 2006 18:37:52 -0800 | From | Chris Wright <> | Subject | [PATCH 14/17] [AF_NETLINK]: Fix DoS in netlink_rcv_skb() (CVE-2006-0035) |
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-stable review patch. If anyone has any objections, please let us know. ------------------
Sanity check nlmsg_len during netlink_rcv_skb. An nlmsg_len == 0 can cause infinite loop in kernel, effectively DoSing machine. Noted by Matin Murray.
Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/netlink/af_netlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.15.y.orig/net/netlink/af_netlink.c +++ linux-2.6.15.y/net/netlink/af_netlink.c @@ -1422,7 +1422,7 @@ static int netlink_rcv_skb(struct sk_buf while (skb->len >= nlmsg_total_size(0)) { nlh = (struct nlmsghdr *) skb->data; - if (skb->len < nlh->nlmsg_len) + if (nlh->nlmsg_len < NLMSG_HDRLEN || skb->len < nlh->nlmsg_len) return 0; total_len = min(NLMSG_ALIGN(nlh->nlmsg_len), skb->len); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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