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Make sure that *really* no more than sizeof(ifr.ifr_name) chars are strcpy-ed to ifr.ifr_name and that the string is *always* NUL terminated. New code shouldn't use strcpy(), too. CID 719692

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This commit is contained in:
Christian Heimes 2012-09-10 01:25:50 +02:00
parent 1b3f3b0316
commit 15b6885fe0
1 changed files with 2 additions and 1 deletions
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3
Modules/socketmodule.c
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@ -1674,7 +1674,8 @@ getsockaddrarg(PySocketSockObject *s, PyObject *args,
if (len == 0) {
ifr.ifr_ifindex = 0;
} else if (len < sizeof(ifr.ifr_name)) {
strcpy(ifr.ifr_name, PyBytes_AS_STRING(interfaceName));
strncpy(ifr.ifr_name, PyBytes_AS_STRING(interfaceName), sizeof(ifr.ifr_name));
ifr.ifr_name[(sizeof(ifr.ifr_name))-1] = '\0';
if (ioctl(s->sock_fd, SIOCGIFINDEX, &ifr) < 0) {
s->errorhandler();
Py_DECREF(interfaceName);