diff options
| author | Daniel Stenberg <daniel@haxx.se> | 2004-06-30 11:48:19 +0000 |
|---|---|---|
| committer | Daniel Stenberg <daniel@haxx.se> | 2004-06-30 11:48:19 +0000 |
| commit | 4af08a19f85c577d9b1f2df892c82e34e473f31d (patch) | |
| tree | 4ca5f208bb6c84b203f385ca6113c3598f7a3f1e /lib/if2ip.c | |
| parent | c14650caec03669b80324854c0a70dcc5301e59c (diff) | |
passing in a very long interface name could make a buffer overflow
Diffstat (limited to 'lib/if2ip.c')
| -rw-r--r-- | lib/if2ip.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/if2ip.c b/lib/if2ip.c index 237d1f758..b167b8df6 100644 --- a/lib/if2ip.c +++ b/lib/if2ip.c @@ -94,8 +94,11 @@ char *Curl_if2ip(const char *interface, char *buf, int buf_size) } else { struct ifreq req; + size_t len = strlen(interface); memset(&req, 0, sizeof(req)); - strcpy(req.ifr_name, interface); + if(len >= sizeof(req.ifr_name)) + return NULL; /* this can't be a fine interface name */ + memcpy(req.ifr_name, interface, len+1); req.ifr_addr.sa_family = AF_INET; #ifdef IOCTL_3_ARGS if (SYS_ERROR == ioctl(dummy, SIOCGIFADDR, &req)) { |