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netfilter: nfnetlink_{log,queue}: fix information leaks in netlink message

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These structs have a "_pad" member.  Also the "phw" structs have an 8
byte "hw_addr[]" array but sometimes only the first 6 bytes are
initialized.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Dan Carpenter 2013-08-01 12:36:57 +03:00 committed by Pablo Neira Ayuso
parent a206bcb3b0
commit e4d091d7bf
2 changed files with 9 additions and 2 deletions
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6
net/netfilter/nfnetlink_log.c
View File

@ -419,6 +419,7 @@ __build_packet_message(struct nfnl_log_net *log,
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = htons(inst->group_num);
memset(&pmsg, 0, sizeof(pmsg));
pmsg.hw_protocol = skb->protocol;
pmsg.hook = hooknum;
@ -498,7 +499,10 @@ __build_packet_message(struct nfnl_log_net *log,
if (indev && skb->dev &&
skb->mac_header != skb->network_header) {
struct nfulnl_msg_packet_hw phw;
int len = dev_parse_header(skb, phw.hw_addr);
int len;
memset(&phw, 0, sizeof(phw));
len = dev_parse_header(skb, phw.hw_addr);
if (len > 0) {
phw.hw_addrlen = htons(len);
if (nla_put(inst->skb, NFULA_HWADDR, sizeof(phw), &phw))

5
net/netfilter/nfnetlink_queue_core.c
View File

@ -463,7 +463,10 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue,
if (indev && entskb->dev &&
entskb->mac_header != entskb->network_header) {
struct nfqnl_msg_packet_hw phw;
int len = dev_parse_header(entskb, phw.hw_addr);
int len;
memset(&phw, 0, sizeof(phw));
len = dev_parse_header(entskb, phw.hw_addr);
if (len) {
phw.hw_addrlen = htons(len);
if (nla_put(skb, NFQA_HWADDR, sizeof(phw), &phw))