Missing initializations in dumped data

2009-10-20 / 2009-10-21
Risk: Low
Local: Yes
Remote: No
CWE: CWE-Other


Ogólna skala CVSS: 4.9/10
Znaczenie: 6.9/10
Łatwość wykorzystania: 3.9/10
Wymagany dostęp: Lokalny
Złożoność ataku: Niska
Autoryzacja: Nie wymagana
Wpływ na poufność: Pełny
Wpływ na integralność: Brak
Wpływ na dostępność: Brak

tree a2465b3bf0f4c3bdd1f759d8a90cf8f8db06900a parent b3563c4fbff906991a1b4ef4609f99cca2a0de6a author Patrick McHardy <kaber@trash.net> Wed, 29 Jun 2005 02:55:30 -0700 committer David S. Miller <davem@davemloft.net> Wed, 29 Jun 2005 02:55:30 -0700 [NETLINK]: Missing initializations in dumped data Mostly missing initialization of padding fields of 1 or 2 bytes length, two instances of uninitialized nlmsgerr->msg of 16 bytes length. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net> net/core/neighbour.c | 6 ++++++ net/core/rtnetlink.c | 1 + net/core/wireless.c | 1 + net/ipv4/ipmr.c | 10 ++++++++-- net/ipv6/addrconf.c | 1 + net/sched/act_api.c | 10 +++++++++- net/sched/cls_api.c | 2 ++ net/sched/sch_api.c | 2 ++ net/sched/sch_cbq.c | 2 ++ 9 files changed, 32 insertions(+), 3 deletions(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -1598,6 +1598,8 @@ static int neightbl_fill_info(struct nei read_lock_bh(&tbl->lock); ndtmsg->ndtm_family = tbl->family; + ndtmsg->ndtm_pad1 = 0; + ndtmsg->ndtm_pad2 = 0; RTA_PUT_STRING(skb, NDTA_NAME, tbl->id); RTA_PUT_MSECS(skb, NDTA_GC_INTERVAL, tbl->gc_interval); @@ -1683,6 +1685,8 @@ static int neightbl_fill_param_info(stru read_lock_bh(&tbl->lock); ndtmsg->ndtm_family = tbl->family; + ndtmsg->ndtm_pad1 = 0; + ndtmsg->ndtm_pad2 = 0; RTA_PUT_STRING(skb, NDTA_NAME, tbl->id); if (neightbl_fill_parms(skb, parms) < 0) @@ -1872,6 +1876,8 @@ static int neigh_fill_info(struct sk_buf struct ndmsg *ndm = NLMSG_DATA(nlh); ndm->ndm_family = n->ops->family; + ndm->ndm_pad1 = 0; + ndm->ndm_pad2 = 0; ndm->ndm_flags = n->flags; ndm->ndm_type = n->type; ndm->ndm_ifindex = n->dev->ifindex; diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -189,6 +189,7 @@ static int rtnetlink_fill_ifinfo(struct nlh = NLMSG_NEW(skb, pid, seq, type, sizeof(*r), flags); r = NLMSG_DATA(nlh); r->ifi_family = AF_UNSPEC; + r->__ifi_pad = 0; r->ifi_type = dev->type; r->ifi_index = dev->ifindex; r->ifi_flags = dev_get_flags(dev); diff --git a/net/core/wireless.c b/net/core/wireless.c --- a/net/core/wireless.c +++ b/net/core/wireless.c @@ -1102,6 +1102,7 @@ static inline int rtnetlink_fill_iwinfo( nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r)); r = NLMSG_DATA(nlh); r->ifi_family = AF_UNSPEC; + r->__ifi_pad = 0; r->ifi_type = dev->type; r->ifi_index = dev->ifindex; r->ifi_flags = dev->flags; diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -297,6 +297,7 @@ static int vif_delete(int vifi) static void ipmr_destroy_unres(struct mfc_cache *c) { struct sk_buff *skb; + struct nlmsgerr *e; atomic_dec(&cache_resolve_queue_len); @@ -306,7 +307,9 @@ static void ipmr_destroy_unres(struct mf nlh->nlmsg_type = NLMSG_ERROR; nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); skb_trim(skb, nlh->nlmsg_len); - ((struct nlmsgerr*)NLMSG_DATA(nlh))->error = -ETIMEDOUT; + e = NLMSG_DATA(nlh); + e->error = -ETIMEDOUT; + memset(&e->msg, 0, sizeof(e->msg)); netlink_unicast(rtnl, skb, NETLINK_CB(skb).dst_pid, MSG_DONTWAIT); } else kfree_skb(skb); @@ -499,6 +502,7 @@ static struct mfc_cache *ipmr_cache_allo static void ipmr_cache_resolve(struct mfc_cache *uc, struct mfc_cache *c) { struct sk_buff *skb; + struct nlmsgerr *e; /* * Play the pending entries through our router @@ -515,7 +519,9 @@ static void ipmr_cache_resolve(struct mf nlh->nlmsg_type = NLMSG_ERROR; nlh->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr)); skb_trim(skb, nlh->nlmsg_len); - ((struct nlmsgerr*)NLMSG_DATA(nlh))->error = -EMSGSIZE; + e = NLMSG_DATA(nlh); + e->error = -EMSGSIZE; + memset(&e->msg, 0, sizeof(e->msg)); } err = netlink_unicast(rtnl, skb, NETLINK_CB(skb).dst_pid, MSG_DONTWAIT); } else diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2923,6 +2923,7 @@ static int inet6_fill_ifinfo(struct sk_b nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags); r = NLMSG_DATA(nlh); r->ifi_family = AF_INET6; + r->__ifi_pad = 0; r->ifi_type = dev->type; r->ifi_index = dev->ifindex; r->ifi_flags = dev_get_flags(dev); diff --git a/net/sched/act_api.c b/net/sched/act_api.c --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -439,6 +439,8 @@ tca_get_fill(struct sk_buff *skb, struct t = NLMSG_DATA(nlh); t->tca_family = AF_UNSPEC; + t->tca__pad1 = 0; + t->tca__pad2 = 0; x = (struct rtattr*) skb->tail; RTA_PUT(skb, TCA_ACT_TAB, 0, NULL); @@ -580,6 +582,8 @@ static int tca_action_flush(struct rtatt nlh = NLMSG_PUT(skb, pid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t)); t = NLMSG_DATA(nlh); t->tca_family = AF_UNSPEC; + t->tca__pad1 = 0; + t->tca__pad2 = 0; x = (struct rtattr *) skb->tail; RTA_PUT(skb, TCA_ACT_TAB, 0, NULL); @@ -687,7 +691,9 @@ static int tcf_add_notify(struct tc_acti nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags); t = NLMSG_DATA(nlh); t->tca_family = AF_UNSPEC; - + t->tca__pad1 = 0; + t->tca__pad2 = 0; + x = (struct rtattr*) skb->tail; RTA_PUT(skb, TCA_ACT_TAB, 0, NULL); @@ -842,6 +848,8 @@ tc_dump_action(struct sk_buff *skb, stru cb->nlh->nlmsg_type, sizeof(*t)); t = NLMSG_DATA(nlh); t->tca_family = AF_UNSPEC; + t->tca__pad1 = 0; + t->tca__pad2 = 0; x = (struct rtattr *) skb->tail; RTA_PUT(skb, TCA_ACT_TAB, 0, NULL); diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -331,6 +331,8 @@ tcf_fill_node(struct sk_buff *skb, struc nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); tcm = NLMSG_DATA(nlh); tcm->tcm_family = AF_UNSPEC; + tcm->tcm__pad1 = 0; + tcm->tcm__pad1 = 0; tcm->tcm_ifindex = tp->q->dev->ifindex; tcm->tcm_parent = tp->classid; tcm->tcm_info = TC_H_MAKE(tp->prio, tp->protocol); diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -770,6 +770,8 @@ static int tc_fill_qdisc(struct sk_buff nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*tcm), flags); tcm = NLMSG_DATA(nlh); tcm->tcm_family = AF_UNSPEC; + tcm->tcm__pad1 = 0; + tcm->tcm__pad2 = 0; tcm->tcm_ifindex = q->dev->ifindex; tcm->tcm_parent = clid; tcm->tcm_handle = q->handle; diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c --- a/net/sched/sch_cbq.c +++ b/net/sched/sch_cbq.c @@ -1563,6 +1563,8 @@ static __inline__ int cbq_dump_police(st if (cl->police) { opt.police = cl->police; + opt.__res1 = 0; + opt.__res2 = 0; RTA_PUT(skb, TCA_CBQ_POLICE, sizeof(opt), &opt); } return skb->len;

Referencje:

http://www.openwall.com/lists/oss-security/2009/09/17/9
http://www.openwall.com/lists/oss-security/2009/09/17/1
http://www.openwall.com/lists/oss-security/2009/09/07/2
http://www.openwall.com/lists/oss-security/2009/09/06/2
http://www.openwall.com/lists/oss-security/2009/09/05/2
http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.13/ChangeLog-2.6.13-rc1
http://marc.info/?l=git-commits-head&m=112002138324380
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b3563c4fbff906991a1b4ef4609f99cca2a0de6a
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9ef1d4c7c7aca1cd436612b6ca785b726ffb8ed8
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8a47077a0b5aa2649751c46e7a27884e6686ccbf
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.37.y.git;a=commit;h=3408cce0c2f380884070896420ca566704452fb5
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.37.y.git;a=commit;h=30e744716c4a6cc4e8ecaaddf68f20057c03dc8d
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.37.y.git;a=commit;h=0f3f2328f63c521fe4b435f148687452f98b2349
https://bugzilla.redhat.com/show_bug.cgi?id=521601
http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.37.6


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