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Message-Id: <1288822372-21245-5-git-send-email-kaber@trash.net> Date: Wed, 3 Nov 2010 23:12:51 +0100 From: kaber@...sh.net To: davem@...emloft.net Cc: netfilter-devel@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH 4/5] ipv4: netfilter: arp_tables: fix information leak to userland From: Vasiliy Kulikov <segooon@...il.com> Structure arpt_getinfo is copied to userland with the field "name" that has the last elements unitialized. It leads to leaking of contents of kernel stack memory. Signed-off-by: Vasiliy Kulikov <segooon@...il.com> Signed-off-by: Patrick McHardy <kaber@...sh.net> --- net/ipv4/netfilter/arp_tables.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index 3cad259..3fac340 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -927,6 +927,7 @@ static int get_info(struct net *net, void __user *user, private = &tmp; } #endif + memset(&info, 0, sizeof(info)); info.valid_hooks = t->valid_hooks; memcpy(info.hook_entry, private->hook_entry, sizeof(info.hook_entry)); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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