diff options
| author | Denis Ovsienko <infrastation@yandex.ru> | 2011-09-26 13:18:51 +0400 |
|---|---|---|
| committer | Denis Ovsienko <infrastation@yandex.ru> | 2011-09-26 18:47:16 +0400 |
| commit | abc7ef44ca05493500865ce81f7b84f5c4eb6594 (patch) | |
| tree | 35504952c627e93203df81ebd5c96023879df00b /ospf6d/ospf6_message.h | |
| parent | 09395e2a0e93b2cf4258cb1de91887948796bb68 (diff) | |
ospf6d: CVE-2011-3323 (fortify packet reception)
This vulnerability (CERT-FI #514840) was reported by CROSS project.
ospf6d processes IPv6 prefix structures in incoming packets without
verifying that the declared prefix length is valid. This leads to a
crash
caused by out of bounds memory access.
* ospf6_abr.h: new macros for size/alignment validation
* ospf6_asbr.h: idem
* ospf6_intra.h: idem
* ospf6_lsa.h: idem
* ospf6_message.h: idem
* ospf6_proto.h: idem
* ospf6_message.c
* ospf6_packet_minlen: helper array for ospf6_packet_examin()
* ospf6_lsa_minlen: helper array for ospf6_lsa_examin()
* ospf6_hello_recv(): do not call ospf6_header_examin(), let upper
layer verify the input data
* ospf6_dbdesc_recv(): idem
* ospf6_lsreq_recv(): idem
* ospf6_lsupdate_recv(): idem
* ospf6_lsack_recv(): idem
* ospf6_prefixes_examin(): new function, implements A.4.1
* ospf6_lsa_examin(): new function, implements A.4
* ospf6_lsaseq_examin(): new function, an interface to above
* ospf6_packet_examin(): new function, implements A.3
* ospf6_rxpacket_examin(): new function, replaces
ospf6_header_examin()
* ospf6_header_examin(): sayonara
* ospf6_receive(): perform passive interface check earliest possible,
employ ospf6_rxpacket_examin()
Diffstat (limited to 'ospf6d/ospf6_message.h')
| -rw-r--r-- | ospf6d/ospf6_message.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/ospf6d/ospf6_message.h b/ospf6d/ospf6_message.h index c72f0af4..232b875e 100644 --- a/ospf6d/ospf6_message.h +++ b/ospf6d/ospf6_message.h @@ -52,6 +52,7 @@ extern const char *ospf6_message_type_str[]; (ospf6_message_type_str[ OSPF6_MESSAGE_TYPE_CANONICAL (T) ]) /* OSPFv3 packet header */ +#define OSPF6_HEADER_SIZE 16U struct ospf6_header { u_char version; @@ -67,6 +68,7 @@ struct ospf6_header #define OSPF6_MESSAGE_END(H) ((caddr_t) (H) + ntohs ((H)->length)) /* Hello */ +#define OSPF6_HELLO_MIN_SIZE 20U struct ospf6_hello { u_int32_t interface_id; @@ -80,6 +82,7 @@ struct ospf6_hello }; /* Database Description */ +#define OSPF6_DB_DESC_MIN_SIZE 12U struct ospf6_dbdesc { u_char reserved1; @@ -96,7 +99,9 @@ struct ospf6_dbdesc #define OSPF6_DBDESC_IBIT (0x04) /* initial bit */ /* Link State Request */ +#define OSPF6_LS_REQ_MIN_SIZE 0U /* It is just a sequence of entries below */ +#define OSPF6_LSREQ_LSDESC_FIX_SIZE 12U struct ospf6_lsreq_entry { u_int16_t reserved; /* Must Be Zero */ @@ -106,6 +111,7 @@ struct ospf6_lsreq_entry }; /* Link State Update */ +#define OSPF6_LS_UPD_MIN_SIZE 4U struct ospf6_lsupdate { u_int32_t lsa_number; @@ -113,6 +119,7 @@ struct ospf6_lsupdate }; /* Link State Acknowledgement */ +#define OSPF6_LS_ACK_MIN_SIZE 0U /* It is just a sequence of LSA Headers */ /* Function definition */ |