diff options
Diffstat (limited to 'sql/sql_acl.cc')
| -rw-r--r-- | sql/sql_acl.cc | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc index e07f668b1cf..80662832140 100644 --- a/sql/sql_acl.cc +++ b/sql/sql_acl.cc @@ -1356,10 +1356,19 @@ ulong acl_get(const char *host, const char *ip, { ulong host_access= ~(ulong)0, db_access= 0; uint i; - size_t key_length; + size_t key_length, copy_length; char key[ACL_KEY_LENGTH],*tmp_db,*end; acl_entry *entry; DBUG_ENTER("acl_get"); + + copy_length= (size_t) (strlen(ip ? ip : "") + + strlen(user ? user : "") + + strlen(db ? db : "")); + /* + Make sure that strmov() operations do not result in buffer overflow. + */ + if (copy_length >= ACL_KEY_LENGTH) + DBUG_RETURN(0); VOID(pthread_mutex_lock(&acl_cache->lock)); end=strmov((tmp_db=strmov(strmov(key, ip ? ip : "")+1,user)+1),db); @@ -4340,6 +4349,16 @@ bool check_grant_db(THD *thd,const char *db) char helping [NAME_LEN+USERNAME_LENGTH+2]; uint len; bool error= TRUE; + size_t copy_length; + + copy_length= (size_t) (strlen(sctx->priv_user ? sctx->priv_user : "") + + strlen(db ? db : "")); + + /* + Make sure that strmov() operations do not result in buffer overflow. + */ + if (copy_length >= (NAME_LEN+USERNAME_LENGTH+2)) + return 1; len= (uint) (strmov(strmov(helping, sctx->priv_user) + 1, db) - helping) + 1; |