An unauthenticated command injection vulnerability exists in the StartEPI function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200v2.0.11.001us.tar.gz). The vulnerability occurs because user-supplied CGI parameters (wlant, wlssid, wlrate, ttcpnum, ttcpip, ttcpsize) are concatenated into system command strings without proper sanitization and executed via wlexeccmd. Successful exploitation allows remote attackers to execute arbitrary commands on the device without authentication.
A stack-based buffer overflow exists in the getmergeipaddr function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200v2.0.11.001us.tar.gz). The function concatenates up to four user-supplied CGI parameters matching <parameter>0~3 into a fixed-size buffer (a2) without bounds checking. Remote attackers can exploit this vulnerability via specially crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.
A stack-based buffer overflow exists in the httpd binary of Linksys E1200 v2 routers (Firmware E1200v2.0.11.001us.tar.gz). The applycgi and blockcgi functions copy user-supplied input from the "url" CGI parameter into stack buffers (v36, v29) using sprintf without bounds checking. Because these buffers are allocated as single-byte variables, any non-empty input will trigger a buffer overflow. Remote attackers can exploit this vulnerability via crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.
A stack-based buffer overflow vulnerability exists in the libshared.so library of Cisco Linksys E1200 v2 routers (Firmware E1200v2.0.11.001us.tar.gz). The functions getmacfromip and getipfrommac use sscanf with overly permissive "%100s" format specifiers to parse entries from /proc/net/arp into fixed-size buffers (v6: 50 bytes, v7 sub-arrays: 50 bytes). This allows local attackers controlling the contents of /proc/net/arp to overflow stack buffers, leading to memory corruption, denial of service, or potential arbitrary code execution.
A stack-based buffer overflow exists in the validatestaticroute function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200v2.0.11.001us.tar.gz). The function improperly concatenates user-supplied CGI parameters (routeipaddr0~3, routenetmask0~3, routegateway0~3) into fixed-size buffers (v6, v10, v14) without proper bounds checking. Remote attackers can exploit this vulnerability via specially crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.
A stack-based buffer overflow exists in the getmergemac function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200v2.0.11.001us.tar.gz). The function concatenates up to six user-supplied CGI parameters matching <parameter>0~5 into a fixed-size buffer (a2) without proper bounds checking, appending colon delimiters during concatenation. Remote attackers can exploit this vulnerability via specially crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.