dhclient: Fix the trivial buffer overruns correctly
A DHCP client identifier is simply the hardware type (one byte) concatenated with the hardware address (some variable number of bytes, but at most 16). Limit the size of the temporary buffer to match and the rest of the calculations shake out correctly. This is a follow-up to the incorrect r299512, reverted in r300172. CIDs: 1008682, 1305550 Sponsored by: EMC / Isilon Storage Division
This commit is contained in:
parent
9e9e5fa3d9
commit
16b93d1013
@ -1570,7 +1570,7 @@ make_discover(struct interface_info *ip, struct client_lease *lease)
|
||||
}
|
||||
|
||||
/* set unique client identifier */
|
||||
char client_ident[sizeof(struct hardware)];
|
||||
char client_ident[sizeof(ip->hw_address.haddr) + 1];
|
||||
if (!options[DHO_DHCP_CLIENT_IDENTIFIER]) {
|
||||
int hwlen = (ip->hw_address.hlen < sizeof(client_ident)-1) ?
|
||||
ip->hw_address.hlen : sizeof(client_ident)-1;
|
||||
|
Loading…
Reference in New Issue
Block a user