ced7835c06
1. Very large RRSIG RRsets included in a negative cache can trigger an assertion failure that will crash named (BIND 9 DNS) due to an off-by-one error in a buffer size check. This bug affects all resolving name servers, whether DNSSEC validation is enabled or not, on all BIND versions prior to today. There is a possibility of malicious exploitation of this bug by remote users. 2. Named could fail to validate zones listed in a DLV that validated insecure without using DLV and had DS records in the parent zone. Add a patch provided by ru@ and confirmed by ISC to fix a crash at shutdown time when a SIG(0) key is being used.
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/*
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* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: callbacks.c,v 1.17 2007-06-19 23:47:16 tbox Exp $ */
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/*! \file */
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#include <config.h>
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#include <isc/util.h>
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#include <dns/callbacks.h>
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#include <dns/log.h>
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static void
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stdio_error_warn_callback(dns_rdatacallbacks_t *, const char *, ...)
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ISC_FORMAT_PRINTF(2, 3);
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static void
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isclog_error_callback(dns_rdatacallbacks_t *callbacks, const char *fmt, ...)
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ISC_FORMAT_PRINTF(2, 3);
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static void
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isclog_warn_callback(dns_rdatacallbacks_t *callbacks, const char *fmt, ...)
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ISC_FORMAT_PRINTF(2, 3);
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/*
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* Private
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*/
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static void
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stdio_error_warn_callback(dns_rdatacallbacks_t *callbacks,
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const char *fmt, ...)
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{
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va_list ap;
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UNUSED(callbacks);
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fprintf(stderr, "\n");
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}
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static void
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isclog_error_callback(dns_rdatacallbacks_t *callbacks, const char *fmt, ...) {
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va_list ap;
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UNUSED(callbacks);
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va_start(ap, fmt);
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isc_log_vwrite(dns_lctx, DNS_LOGCATEGORY_GENERAL,
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DNS_LOGMODULE_MASTER, /* XXX */
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ISC_LOG_ERROR, fmt, ap);
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va_end(ap);
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}
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static void
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isclog_warn_callback(dns_rdatacallbacks_t *callbacks, const char *fmt, ...) {
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va_list ap;
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UNUSED(callbacks);
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va_start(ap, fmt);
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isc_log_vwrite(dns_lctx, DNS_LOGCATEGORY_GENERAL,
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DNS_LOGMODULE_MASTER, /* XXX */
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ISC_LOG_WARNING, fmt, ap);
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va_end(ap);
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}
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static void
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dns_rdatacallbacks_initcommon(dns_rdatacallbacks_t *callbacks) {
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REQUIRE(callbacks != NULL);
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callbacks->add = NULL;
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callbacks->add_private = NULL;
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callbacks->error_private = NULL;
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callbacks->warn_private = NULL;
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}
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/*
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* Public.
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*/
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void
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dns_rdatacallbacks_init(dns_rdatacallbacks_t *callbacks) {
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dns_rdatacallbacks_initcommon(callbacks);
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callbacks->error = isclog_error_callback;
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callbacks->warn = isclog_warn_callback;
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}
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void
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dns_rdatacallbacks_init_stdio(dns_rdatacallbacks_t *callbacks) {
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dns_rdatacallbacks_initcommon(callbacks);
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callbacks->error = stdio_error_warn_callback;
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callbacks->warn = stdio_error_warn_callback;
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}
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