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Eric Dumazet e0e3cea46d af_netlink: force credentials passing [CVE-2012-3520] 
Pablo Neira Ayuso discovered that avahi and
potentially NetworkManager accept spoofed Netlink messages because of a
kernel bug.  The kernel passes all-zero SCM_CREDENTIALS ancillary data
to the receiver if the sender did not provide such data, instead of not
including any such data at all or including the correct data from the
peer (as it is the case with AF_UNIX).

This bug was introduced in commit 16e5726269
(af_unix: dont send SCM_CREDENTIALS by default)

This patch forces passing credentials for netlink, as
before the regression.

Another fix would be to not add SCM_CREDENTIALS in
netlink messages if not provided by the sender, but it
might break some programs.

With help from Florian Weimer & Petr Matousek

This issue is designated as CVE-2012-3520

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Petr Matousek <pmatouse@redhat.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2012-08-21 14:53:01 -07:00
..
9p 9p: Reduce object size with CONFIG_NET_9P_DEBUG 2012-01-05 10:51:44 -06:00
bluetooth Bluetooth: Use tx window from config response for ack timing 2012-07-15 12:18:29 -03:00
caif caif-hsi: Remove use of module parameters 2012-06-25 16:44:12 -07:00
irda Fix common misspellings 2011-03-31 11:26:23 -03:00
iucv af_iucv: add shutdown for HS transport 2012-03-07 22:52:24 -08:00
netfilter Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-07-10 23:56:33 -07:00
netns ipv4: remove rt_cache_rebuild_count 2012-07-30 14:53:22 -07:00
nfc NFC: Allow HCI driver to pre-open pipes to some gates 2012-07-09 16:42:12 -04:00
phonet net: remove my future former mail address 2012-06-17 16:29:38 -07:00
sctp sctp: Implement quick failover draft from tsvwg 2012-07-22 12:13:46 -07:00
tc_act
…
act_api.h net: sched: constify tcf_proto and tc_action 2011-07-06 02:52:16 -07:00
addrconf.h ipv6: add ipv6_addr_hash() helper 2012-07-18 11:28:46 -07:00
af_ieee802154.h
…
af_rxrpc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_unix.h af_unix: speedup /proc/net/unix 2012-06-08 14:27:23 -07:00
ah.h ipsec: update MAX_AH_AUTH_LEN to support sha512 2011-01-13 21:48:25 -08:00
arp.h ipv4: Fix neigh lookup keying over loopback/point-to-point devices. 2012-07-20 16:06:10 -07:00
atmclip.h atm: clip: Use device neigh support on top of "arp_tbl". 2011-11-30 18:51:03 -05:00
ax25.h net ax25: Fix the build when sysctl support is disabled. 2012-04-23 22:14:47 -04:00
ax88796.h
…
cfg80211-wext.h cfg80211: remove unused wext handler exports 2011-08-08 14:26:29 -04:00
cfg80211.h cfg80211: add channel flag to prohibit OFDM operation 2012-08-02 15:30:49 +02:00
checksum.h
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cipso_ipv4.h cipso: handle CIPSO options correctly when NetLabel is disabled 2012-06-01 14:18:29 -04:00
cls_cgroup.h Merge commit 'v2.6.36-rc7' into core/rcu 2010-10-07 09:43:45 +02:00
codel.h codel: refine one condition to avoid a nul rec_inv_sqrt 2012-08-10 16:52:54 -07:00
compat.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
datalink.h
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dcbevent.h dcb: Add stub routines for !CONFIG_DCB 2011-10-06 15:49:51 -04:00
dcbnl.h net/dcb: Add an optional max rate attribute 2012-04-05 05:08:04 -04:00
dn.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dn_dev.h decnet: RCU conversion and get rid of dev_base_lock 2010-11-08 13:50:08 -08:00
dn_fib.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dn_neigh.h
…
dn_nsp.h
…
dn_route.h decnet: Use neighbours privately in dn_route struct. 2012-07-05 01:12:14 -07:00
dsa.h dsa: Include linux/if_ether.h to fix build error 2011-12-01 11:41:06 -05:00
dsfield.h
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dst.h net: force dst_default_metrics to const section 2012-08-08 16:00:28 -07:00
dst_ops.h net: Fix warnings in dst_ops.h 2012-07-19 10:43:03 -07:00
esp.h
…
ethoc.h
…
fib_rules.h ipv4: Elide fib_validate_source() completely when possible. 2012-06-29 01:36:36 -07:00
flow.h ipv4: Kill FLOWI_FLAG_RT_NOCACHE and associated code. 2012-07-20 13:36:54 -07:00
flow_keys.h flow_dissector: use a 64bit load/store 2011-11-29 13:17:03 -05:00
garp.h garp: remove last synchronize_rcu() call 2011-05-12 17:46:56 -04:00
gen_stats.h Fix common misspellings 2011-03-31 11:26:23 -03:00
genetlink.h net: Use NLMSG_DEFAULT_SIZE in combination with nlmsg_new() 2012-06-28 17:56:43 -07:00
gre.h
…
icmp.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
ieee80211_radiotap.h wireless: move ieee80211chan2mhz macro 2011-11-11 12:32:50 -05:00
ieee802154.h 6LoWPAN: add fragmentation support 2011-11-14 00:19:42 -05:00
ieee802154_netdev.h mac802154: declare reduced mlme operations 2012-05-16 15:16:56 -04:00
if_inet6.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
inet6_connection_sock.h ipv6: Add helper inet6_csk_update_pmtu(). 2012-07-16 03:44:56 -07:00
inet6_hashtables.h ipv6: Early TCP socket demux 2012-07-26 15:50:39 -07:00
inet_common.h net-tcp: Fast Open client - sendmsg(MSG_FASTOPEN) 2012-07-19 11:02:03 -07:00
inet_connection_sock.h net: ipv6: fix TCP early demux 2012-08-06 13:33:21 -07:00
inet_ecn.h inet: add rfc 3168 extract in front of INET_ECN_encapsulate() 2011-10-22 01:25:23 -04:00
inet_frag.h ip_frag: struct inet_frags match() method returns a bool 2012-05-18 01:40:27 -04:00
inet_hashtables.h ipv4: Early TCP socket demux. 2012-06-19 21:22:05 -07:00
inet_sock.h net: ipv6: fix TCP early demux 2012-08-06 13:33:21 -07:00
inet_timewait_sock.h inet: remove rcu protection on tw_net 2011-12-14 13:34:55 -05:00
inetpeer.h ipv4: Maintain redirect and PMTU info in struct rtable again. 2012-07-10 22:40:14 -07:00
ip.h ipv4: fix ip_send_skb() 2012-08-10 14:08:57 -07:00
ip6_checksum.h
…
ip6_fib.h ipv6: Store route neighbour in rt6_info struct. 2012-07-05 02:41:58 -07:00
ip6_route.h ipv6: fix inet6_csk_xmit() 2012-07-18 08:59:58 -07:00
ip6_tunnel.h ipv6_tunnel: Allow receiving packets on the fallback tunnel if they pass sanity checks 2012-06-29 00:52:32 -07:00
ip_fib.h ipv4: Cache routes in nexthop exception entries. 2012-07-31 15:02:02 -07:00
ip_vs.h ipvs: fix oops on NAT reply in br_nf context 2012-07-17 12:00:46 +02:00
ipcomp.h
…
ipconfig.h
…
ipip.h tunnel: implement 64 bits statistics 2012-04-14 14:47:05 -04:00
ipv6.h ipv6: add ipv6_addr_hash() helper 2012-07-18 11:28:46 -07:00
ipx.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
iw_handler.h Fix common misspellings 2011-03-31 11:26:23 -03:00
lapb.h lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
lib80211.h include: replace linux/module.h with "struct module" wherever possible 2011-10-31 19:32:32 -04:00
llc.h llc2: Fix silent failure of llc_station_init() 2012-08-14 16:51:18 -07:00
llc_c_ac.h
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llc_c_ev.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
llc_c_st.h
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llc_conn.h
…
llc_if.h
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llc_pdu.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
llc_s_ac.h
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llc_s_ev.h
…
llc_s_st.h
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llc_sap.h
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mac80211.h mac80211: add time synchronisation with BSS for assoc 2012-07-12 12:10:46 +02:00
mac802154.h mac802154: add wpan device-class support 2012-06-26 21:06:11 -07:00
mip6.h
…
mld.h
…
ndisc.h ipv6: Export ndisc option parsing from ndisc.c 2012-07-11 23:39:11 -07:00
neighbour.h net: Do delayed neigh confirmation. 2012-07-05 01:03:06 -07:00
net_namespace.h net: make sock diag per-namespace 2012-07-16 22:31:34 -07:00
net_ratelimit.h net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00
netdma.h
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netevent.h net: Pass neighbours and dest address into NETEVENT_REDIRECT events. 2012-07-05 02:21:55 -07:00
netlabel.h doc: Update the email address for Paul Moore in various source files 2011-08-01 17:58:33 -07:00
netlink.h netlink: Delete all NLA_PUT*() macros. 2012-04-02 04:33:45 -04:00
netprio_cgroup.h net: netprio_cgroup: rework update socket logic 2012-07-22 12:44:01 -07:00
netrom.h
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nexthop.h
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nl802154.h
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p8022.h
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ping.h net: ping: fix build failure 2011-05-17 14:16:58 -04:00
pkt_cls.h net: Fix range checks in tcf_valid_offset(). 2010-12-21 12:43:16 -08:00
pkt_sched.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
protocol.h ipv6: Early TCP socket demux 2012-07-26 15:50:39 -07:00
psnap.h
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raw.h
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rawv6.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
red.h net_sched: red: Make minor corrections to comments 2012-04-16 23:53:11 -04:00
regulatory.h cfg80211: add cellular base station regulatory hint support 2012-07-17 12:16:39 +02:00
request_sock.h tcp: Change possible SYN flooding messages 2011-09-15 14:49:43 -04:00
rose.h rose: Add length checks to CALL_REQUEST parsing 2011-03-27 17:59:04 -07:00
route.h ipv4: Properly purge netdev references on uncached routes. 2012-07-31 15:06:50 -07:00
rtnetlink.h rtnl: allow to specify different num for rx and tx queue count 2012-07-20 11:06:59 -07:00
sch_generic.h net: rename bond_queue_mapping to slave_dev_queue_mapping 2012-07-20 11:07:00 -07:00
scm.h af_netlink: force credentials passing [CVE-2012-3520] 2012-08-21 14:53:01 -07:00
secure_seq.h tcp: add const qualifiers where possible 2011-10-21 05:22:42 -04:00
slhc_vj.h
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snmp.h Merge branch 'for-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2012-01-09 13:08:28 -08:00
sock.h tcp: Apply device TSO segment limit earlier 2012-08-02 00:19:17 -07:00
stp.h
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tcp.h net: tcp: ipv6_mapped needs sk_rx_dst_set method 2012-08-09 20:56:09 -07:00
tcp_memcontrol.h cgroup: pass struct mem_cgroup instead of struct cgroup to socket memcg 2012-04-10 10:04:07 -07:00
tcp_states.h
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timewait_sock.h [PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary. 2012-06-09 14:56:12 -07:00
transp_v6.h net: relax PKTINFO non local ipv6 udp xmit check 2011-08-30 17:39:01 -04:00
udp.h net/ipv6/udp: UDP encapsulation: introduce encap_rcv hook into IPv6 2012-04-28 22:21:51 -04:00
udplite.h net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
wext.h
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wimax.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
wpan-phy.h mac802154: monitor device support 2012-05-16 15:17:08 -04:00
x25.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
x25device.h
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xfrm.h net: ipv6: fix oops in inet_putpeer() 2012-08-20 02:56:56 -07:00