Upgrade to tcpdump 4.9.2.
From CHANGES:
Sunday September 3, 2017 denis@ovsienko.info
Summary for 4.9.2 tcpdump release
Do not use getprotobynumber() for protocol name resolution. Do not do
any protocol name resolution if -n is specified.
Improve errors detection in the test scripts.
Fix a segfault with OpenSSL 1.1 and improve OpenSSL usage.
Clean up IS-IS printing.
Fix buffer overflow vulnerabilities:
CVE-2017-11543 (SLIP)
CVE-2017-13011 (bittok2str_internal)
Fix infinite loop vulnerabilities:
CVE-2017-12989 (RESP)
CVE-2017-12990 (ISAKMP)
CVE-2017-12995 (DNS)
CVE-2017-12997 (LLDP)
Fix buffer over-read vulnerabilities:
CVE-2017-11541 (safeputs)
CVE-2017-11542 (PIMv1)
CVE-2017-12893 (SMB/CIFS)
CVE-2017-12894 (lookup_bytestring)
CVE-2017-12895 (ICMP)
CVE-2017-12896 (ISAKMP)
CVE-2017-12897 (ISO CLNS)
CVE-2017-12898 (NFS)
CVE-2017-12899 (DECnet)
CVE-2017-12900 (tok2strbuf)
CVE-2017-12901 (EIGRP)
CVE-2017-12902 (Zephyr)
CVE-2017-12985 (IPv6)
CVE-2017-12986 (IPv6 routing headers)
CVE-2017-12987 (IEEE 802.11)
CVE-2017-12988 (telnet)
CVE-2017-12991 (BGP)
CVE-2017-12992 (RIPng)
CVE-2017-12993 (Juniper)
CVE-2017-11542 (PIMv1)
CVE-2017-11541 (safeputs)
CVE-2017-12994 (BGP)
CVE-2017-12996 (PIMv2)
CVE-2017-12998 (ISO IS-IS)
CVE-2017-12999 (ISO IS-IS)
CVE-2017-13000 (IEEE 802.15.4)
CVE-2017-13001 (NFS)
CVE-2017-13002 (AODV)
CVE-2017-13003 (LMP)
CVE-2017-13004 (Juniper)
CVE-2017-13005 (NFS)
CVE-2017-13006 (L2TP)
CVE-2017-13007 (Apple PKTAP)
CVE-2017-13008 (IEEE 802.11)
CVE-2017-13009 (IPv6 mobility)
CVE-2017-13010 (BEEP)
CVE-2017-13012 (ICMP)
CVE-2017-13013 (ARP)
CVE-2017-13014 (White Board)
CVE-2017-13015 (EAP)
CVE-2017-11543 (SLIP)
CVE-2017-13016 (ISO ES-IS)
CVE-2017-13017 (DHCPv6)
CVE-2017-13018 (PGM)
CVE-2017-13019 (PGM)
CVE-2017-13020 (VTP)
CVE-2017-13021 (ICMPv6)
CVE-2017-13022 (IP)
CVE-2017-13023 (IPv6 mobility)
CVE-2017-13024 (IPv6 mobility)
CVE-2017-13025 (IPv6 mobility)
CVE-2017-13026 (ISO IS-IS)
CVE-2017-13027 (LLDP)
CVE-2017-13028 (BOOTP)
CVE-2017-13029 (PPP)
CVE-2017-13030 (PIM)
CVE-2017-13031 (IPv6 fragmentation header)
CVE-2017-13032 (RADIUS)
CVE-2017-13033 (VTP)
CVE-2017-13034 (PGM)
CVE-2017-13035 (ISO IS-IS)
CVE-2017-13036 (OSPFv3)
CVE-2017-13037 (IP)
CVE-2017-13038 (PPP)
CVE-2017-13039 (ISAKMP)
CVE-2017-13040 (MPTCP)
CVE-2017-13041 (ICMPv6)
CVE-2017-13042 (HNCP)
CVE-2017-13043 (BGP)
CVE-2017-13044 (HNCP)
CVE-2017-13045 (VQP)
CVE-2017-13046 (BGP)
CVE-2017-13047 (ISO ES-IS)
CVE-2017-13048 (RSVP)
CVE-2017-13049 (Rx)
CVE-2017-13050 (RPKI-Router)
CVE-2017-13051 (RSVP)
CVE-2017-13052 (CFM)
CVE-2017-13053 (BGP)
CVE-2017-13054 (LLDP)
CVE-2017-13055 (ISO IS-IS)
CVE-2017-13687 (Cisco HDLC)
CVE-2017-13688 (OLSR)
CVE-2017-13689 (IKEv1)
CVE-2017-13690 (IKEv2)
CVE-2017-13725 (IPv6 routing headers)
Bug: N/A
Test: ran manually
Change-Id: I6fbfa46046ee89d40d13024777e27623a23cb258
diff --git a/print-vtp.c b/print-vtp.c
index 285beb9..d153cc1 100644
--- a/print-vtp.c
+++ b/print-vtp.c
@@ -13,9 +13,8 @@
* FOR A PARTICULAR PURPOSE.
*
* Reference documentation:
- * http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml
- * http://www.cisco.com/warp/public/473/21.html
- * http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
+ * http://www.cisco.com/c/en/us/support/docs/lan-switching/vtp/10558-21.html
+ * http://docstore.mik.ua/univercd/cc/td/doc/product/lan/trsrb/frames.htm
*
* Original code ode by Carles Kishimoto <carles.kishimoto@gmail.com>
*/
@@ -36,7 +35,7 @@
#define VTP_DOMAIN_NAME_LEN 32
#define VTP_MD5_DIGEST_LEN 16
#define VTP_UPDATE_TIMESTAMP_LEN 12
-#define VTP_VLAN_INFO_OFFSET 12
+#define VTP_VLAN_INFO_FIXED_PART_LEN 12 /* length of VLAN info before VLAN name */
#define VTP_SUMMARY_ADV 0x01
#define VTP_SUBSET_ADV 0x02
@@ -223,6 +222,7 @@
*
*/
+ ND_TCHECK_32BITS(tptr);
ND_PRINT((ndo, ", Config Rev %x", EXTRACT_32BITS(tptr)));
/*
@@ -243,6 +243,7 @@
tptr += 4;
while (tptr < (pptr+length)) {
+ ND_TCHECK_8BITS(tptr);
len = *tptr;
if (len == 0)
break;
@@ -250,6 +251,8 @@
ND_TCHECK2(*tptr, len);
vtp_vlan = (const struct vtp_vlan_*)tptr;
+ if (len < VTP_VLAN_INFO_FIXED_PART_LEN)
+ goto trunc;
ND_TCHECK(*vtp_vlan);
ND_PRINT((ndo, "\n\tVLAN info status %s, type %s, VLAN-id %u, MTU %u, SAID 0x%08x, Name ",
tok2str(vtp_vlan_status,"Unknown",vtp_vlan->status),
@@ -257,22 +260,33 @@
EXTRACT_16BITS(&vtp_vlan->vlanid),
EXTRACT_16BITS(&vtp_vlan->mtu),
EXTRACT_32BITS(&vtp_vlan->index)));
- fn_printzp(ndo, tptr + VTP_VLAN_INFO_OFFSET, vtp_vlan->name_len, NULL);
+ len -= VTP_VLAN_INFO_FIXED_PART_LEN;
+ tptr += VTP_VLAN_INFO_FIXED_PART_LEN;
+ if (len < 4*((vtp_vlan->name_len + 3)/4))
+ goto trunc;
+ ND_TCHECK2(*tptr, vtp_vlan->name_len);
+ fn_printzp(ndo, tptr, vtp_vlan->name_len, NULL);
- /*
- * Vlan names are aligned to 32-bit boundaries.
- */
- len -= VTP_VLAN_INFO_OFFSET + 4*((vtp_vlan->name_len + 3)/4);
- tptr += VTP_VLAN_INFO_OFFSET + 4*((vtp_vlan->name_len + 3)/4);
+ /*
+ * Vlan names are aligned to 32-bit boundaries.
+ */
+ len -= 4*((vtp_vlan->name_len + 3)/4);
+ tptr += 4*((vtp_vlan->name_len + 3)/4);
/* TLV information follows */
while (len > 0) {
/*
- * Cisco specs says 2 bytes for type + 2 bytes for length, take only 1
- * See: http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
+ * Cisco specs say 2 bytes for type + 2 bytes for length;
+ * see http://docstore.mik.ua/univercd/cc/td/doc/product/lan/trsrb/frames.htm
+ * However, actual packets on the wire appear to use 1
+ * byte for the type and 1 byte for the length, so that's
+ * what we do.
*/
+ if (len < 2)
+ goto trunc;
+ ND_TCHECK2(*tptr, 2);
type = *tptr;
tlv_len = *(tptr+1);
@@ -280,59 +294,65 @@
tok2str(vtp_vlan_tlv_values, "Unknown", type),
type));
- /*
- * infinite loop check
- */
- if (type == 0 || tlv_len == 0) {
+ if (len < tlv_len * 2 + 2) {
+ ND_PRINT((ndo, " (TLV goes past the end of the packet)"));
return;
}
-
ND_TCHECK2(*tptr, tlv_len * 2 +2);
- tlv_value = EXTRACT_16BITS(tptr+2);
+ /*
+ * We assume the value is a 2-byte integer; the length is
+ * in units of 16-bit words.
+ */
+ if (tlv_len != 1) {
+ ND_PRINT((ndo, " (invalid TLV length %u != 1)", tlv_len));
+ return;
+ } else {
+ tlv_value = EXTRACT_16BITS(tptr+2);
- switch (type) {
- case VTP_VLAN_STE_HOP_COUNT:
- ND_PRINT((ndo, ", %u", tlv_value));
- break;
+ switch (type) {
+ case VTP_VLAN_STE_HOP_COUNT:
+ ND_PRINT((ndo, ", %u", tlv_value));
+ break;
- case VTP_VLAN_PRUNING:
- ND_PRINT((ndo, ", %s (%u)",
- tlv_value == 1 ? "Enabled" : "Disabled",
- tlv_value));
- break;
+ case VTP_VLAN_PRUNING:
+ ND_PRINT((ndo, ", %s (%u)",
+ tlv_value == 1 ? "Enabled" : "Disabled",
+ tlv_value));
+ break;
- case VTP_VLAN_STP_TYPE:
- ND_PRINT((ndo, ", %s (%u)",
- tok2str(vtp_stp_type_values, "Unknown", tlv_value),
- tlv_value));
- break;
+ case VTP_VLAN_STP_TYPE:
+ ND_PRINT((ndo, ", %s (%u)",
+ tok2str(vtp_stp_type_values, "Unknown", tlv_value),
+ tlv_value));
+ break;
- case VTP_VLAN_BRIDGE_TYPE:
- ND_PRINT((ndo, ", %s (%u)",
- tlv_value == 1 ? "SRB" : "SRT",
- tlv_value));
- break;
+ case VTP_VLAN_BRIDGE_TYPE:
+ ND_PRINT((ndo, ", %s (%u)",
+ tlv_value == 1 ? "SRB" : "SRT",
+ tlv_value));
+ break;
- case VTP_VLAN_BACKUP_CRF_MODE:
- ND_PRINT((ndo, ", %s (%u)",
- tlv_value == 1 ? "Backup" : "Not backup",
- tlv_value));
- break;
+ case VTP_VLAN_BACKUP_CRF_MODE:
+ ND_PRINT((ndo, ", %s (%u)",
+ tlv_value == 1 ? "Backup" : "Not backup",
+ tlv_value));
+ break;
- /*
- * FIXME those are the defined TLVs that lack a decoder
- * you are welcome to contribute code ;-)
- */
+ /*
+ * FIXME those are the defined TLVs that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
- case VTP_VLAN_SOURCE_ROUTING_RING_NUMBER:
- case VTP_VLAN_SOURCE_ROUTING_BRIDGE_NUMBER:
- case VTP_VLAN_PARENT_VLAN:
- case VTP_VLAN_TRANS_BRIDGED_VLAN:
- case VTP_VLAN_ARP_HOP_COUNT:
- default:
- print_unknown_data(ndo, tptr, "\n\t\t ", 2 + tlv_len*2);
- break;
+ case VTP_VLAN_SOURCE_ROUTING_RING_NUMBER:
+ case VTP_VLAN_SOURCE_ROUTING_BRIDGE_NUMBER:
+ case VTP_VLAN_PARENT_VLAN:
+ case VTP_VLAN_TRANS_BRIDGED_VLAN:
+ case VTP_VLAN_ARP_HOP_COUNT:
+ default:
+ print_unknown_data(ndo, tptr, "\n\t\t ", 2 + tlv_len*2);
+ break;
+ }
}
len -= 2 + tlv_len*2;
tptr += 2 + tlv_len*2;