diff options
Diffstat (limited to 'nis/nss_nis/nis-service.c')
| -rw-r--r-- | nis/nss_nis/nis-service.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/nis/nss_nis/nis-service.c b/nis/nss_nis/nis-service.c index fd79d3fe07..4991ed3342 100644 --- a/nis/nss_nis/nis-service.c +++ b/nis/nss_nis/nis-service.c @@ -271,6 +271,13 @@ _nss_nis_getservbyname_r (const char *name, const char *protocol, /* If the protocol is given, we could try if our NIS server knows about services.byservicename map. If yes, we only need one query. */ size_t keylen = strlen (name) + (protocol ? 1 + strlen (protocol) : 0); + /* Limit key length to the maximum size of an RPC packet. */ + if (keylen > UDPMSGSIZE) + { + *errnop = ERANGE; + return NSS_STATUS_UNAVAIL; + } + char key[keylen + 1]; /* key is: "name/proto" */ @@ -355,6 +362,13 @@ _nss_nis_getservbyport_r (int port, const char *protocol, Otherwise try first port/tcp, then port/udp and then fallback to sequential scanning of services.byname. */ const char *proto = protocol != NULL ? protocol : "tcp"; + /* Limit protocol name length to the maximum size of an RPC packet. */ + if (strlen (proto) > UDPMSGSIZE) + { + *errnop = ERANGE; + return NSS_STATUS_UNAVAIL; + } + do { /* key is: "port/proto" */ |