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import dnsmasq-2.79-23.el8

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CentOS Sources 2022-08-02 06:12:24 +00:00 committed by Stepan Oksanichenko
parent bd93ce3c53
commit a77fffeef9
4 changed files with 376 additions and 1 deletions
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25
SOURCES/dnsmasq-2.81-linux-SIOCGSTAMP.patch Normal file
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@ -0,0 +1,25 @@
From 3052ce208acf602f0163166dcefb7330d537cedb Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Wed, 24 Jul 2019 17:34:48 +0100
Subject: [PATCH] Fix build after y2038 changes in glib.
SIOCGSTAMP is defined in linux/sockios.h, not asm/sockios.h now.
---
src/dnsmasq.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index ff3204a..3ef04ad 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -137,6 +137,7 @@ typedef unsigned long long u64;
#endif
#if defined(HAVE_LINUX_NETWORK)
+#include <linux/sockios.h>
#include <linux/capability.h>
/* There doesn't seem to be a universally-available
userspace header for these. */
--
2.36.1

161
SOURCES/dnsmasq-2.81-option6-ntp-server-suboption.patch Normal file
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@ -0,0 +1,161 @@
From 03936d309782da038a2982b08fce7be85d884f0e Mon Sep 17 00:00:00 2001
From: Vladislav Grishenko <themiron@mail.ru>
Date: Sun, 8 Mar 2020 15:34:34 +0000
Subject: [PATCH] Add DHCPv6 ntp-server (56) option handling.
There was discussion in the past regarding DHCPv6 NTP server option
which needs special subclassing per RFC5908.
Patch adds support for unicast, multicast IPv6 address and for FQDN string,
preserving possibly used (as suggested earlier) hex value.
Unfortunately it's still not fully free from limitations - only address list or
only fqdn value list is possible, not mixed due current
state option parsing & flagging.
(cherry picked from commit dded78b2338147daf69064d6d48c16b12744e441)
---
src/dhcp-common.c | 2 +-
src/dhcp6-protocol.h | 4 ++++
src/option.c | 19 ++++++++++++++++---
src/rfc3315.c | 24 ++++++++++++++++++++----
4 files changed, 41 insertions(+), 8 deletions(-)
diff --git a/src/dhcp-common.c b/src/dhcp-common.c
index 368d686..242a5a1 100644
--- a/src/dhcp-common.c
+++ b/src/dhcp-common.c
@@ -642,7 +642,7 @@ static const struct opttab_t opttab6[] = {
{ "sntp-server", 31, OT_ADDR_LIST },
{ "information-refresh-time", 32, OT_TIME },
{ "FQDN", 39, OT_INTERNAL | OT_RFC1035_NAME },
- { "ntp-server", 56, 0 },
+ { "ntp-server", 56, 0 /* OT_ADDR_LIST | OT_RFC1035_NAME */ },
{ "bootfile-url", 59, OT_NAME },
{ "bootfile-param", 60, OT_CSTRING },
{ "client-arch", 61, 2 | OT_DEC }, /* RFC 5970 */
diff --git a/src/dhcp6-protocol.h b/src/dhcp6-protocol.h
index fee5d28..05560e8 100644
--- a/src/dhcp6-protocol.h
+++ b/src/dhcp6-protocol.h
@@ -59,12 +59,16 @@
#define OPTION6_REMOTE_ID 37
#define OPTION6_SUBSCRIBER_ID 38
#define OPTION6_FQDN 39
+#define OPTION6_NTP_SERVER 56
#define OPTION6_CLIENT_MAC 79
/* replace this with the real number when allocated.
defining this also enables the relevant code. */
/* #define OPTION6_PREFIX_CLASS 99 */
+#define NTP_SUBOPTION_SRV_ADDR 1
+#define NTP_SUBOPTION_MC_ADDR 2
+#define NTP_SUBOPTION_SRV_FQDN 3
#define DHCP6SUCCESS 0
#define DHCP6UNSPEC 1
diff --git a/src/option.c b/src/option.c
index 6fa7bbd..1382c55 100644
--- a/src/option.c
+++ b/src/option.c
@@ -1245,6 +1245,12 @@ static int parse_dhcp_opt(char *errstr, char *arg, int flags)
if (!found_dig)
is_dec = is_addr = 0;
+#ifdef HAVE_DHCP6
+ /* NTP server option takes hex, addresses or FQDN */
+ if (is6 && new->opt == OPTION6_NTP_SERVER && !is_hex)
+ opt_len |= is_addr6 ? OT_ADDR_LIST : OT_RFC1035_NAME;
+#endif
+
/* We know that some options take addresses */
if (opt_len & OT_ADDR_LIST)
{
@@ -1505,8 +1511,9 @@ static int parse_dhcp_opt(char *errstr, char *arg, int flags)
}
else if (comma && (opt_len & OT_RFC1035_NAME))
{
- unsigned char *p = NULL, *newp, *end;
+ unsigned char *p = NULL, *q, *newp, *end;
int len = 0;
+ int header_size = (is6 && new->opt == OPTION6_NTP_SERVER) ? 4 : 0;
arg = comma;
comma = split(arg);
@@ -1516,7 +1523,7 @@ static int parse_dhcp_opt(char *errstr, char *arg, int flags)
if (!dom)
goto_err(_("bad domain in dhcp-option"));
- newp = opt_malloc(len + strlen(dom) + 2);
+ newp = opt_malloc(len + header_size + strlen(dom) + 2);
if (p)
{
@@ -1525,8 +1532,14 @@ static int parse_dhcp_opt(char *errstr, char *arg, int flags)
}
p = newp;
- end = do_rfc1035_name(p + len, dom, NULL);
+ q = p + len;
+ end = do_rfc1035_name(q + header_size, dom, NULL);
*end++ = 0;
+ if (is6 && new->opt == OPTION6_NTP_SERVER)
+ {
+ PUTSHORT(NTP_SUBOPTION_SRV_FQDN, q);
+ PUTSHORT(end - q - 2, q);
+ }
len = end - p;
free(dom);
diff --git a/src/rfc3315.c b/src/rfc3315.c
index 1f1aad8..0fa12ad 100644
--- a/src/rfc3315.c
+++ b/src/rfc3315.c
@@ -1380,23 +1380,39 @@ static struct dhcp_netid *add_options(struct state *state, int do_refresh)
for (a = (struct in6_addr *)opt_cfg->val, j = 0; j < opt_cfg->len; j+=IN6ADDRSZ, a++)
{
+ struct in6_addr *p = NULL;
+
if (IN6_IS_ADDR_UNSPECIFIED(a))
{
if (!add_local_addrs(state->context))
- put_opt6(state->fallback, IN6ADDRSZ);
+ p = state->fallback;
}
else if (IN6_IS_ADDR_ULA_ZERO(a))
{
if (!IN6_IS_ADDR_UNSPECIFIED(state->ula_addr))
- put_opt6(state->ula_addr, IN6ADDRSZ);
+ p = state->ula_addr;
}
else if (IN6_IS_ADDR_LINK_LOCAL_ZERO(a))
{
if (!IN6_IS_ADDR_UNSPECIFIED(state->ll_addr))
- put_opt6(state->ll_addr, IN6ADDRSZ);
+ p = state->ll_addr;
+ }
+ else
+ p = a;
+
+ if (!p)
+ continue;
+ else if (opt_cfg->opt == OPTION6_NTP_SERVER)
+ {
+ if (IN6_IS_ADDR_MULTICAST(p))
+ o1 = new_opt6(NTP_SUBOPTION_MC_ADDR);
+ else
+ o1 = new_opt6(NTP_SUBOPTION_SRV_ADDR);
+ put_opt6(p, IN6ADDRSZ);
+ end_opt6(o1);
}
else
- put_opt6(a, IN6ADDRSZ);
+ put_opt6(p, IN6ADDRSZ);
}
end_opt6(o);
--
2.36.1

175
SOURCES/dnsmasq-2.87-CVE-2022-0934.patch Normal file
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@ -0,0 +1,175 @@
From b0cb924292daecc1cc89fbd3911373eb468fc8f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Tue, 22 Feb 2022 00:45:01 +0100
Subject: [PATCH] Change message type by dedicated function
Long-term pointer to beginning of message does not work well. I case
outpacket is reallocated in any new_opt6() section, original outmsgtypep
pointer becomes invalid. Instead of using that pointer use dedicated
function, which will change just the first byte of the message.
This makes sure correct beginning of packet is always used.
---
src/dnsmasq.h | 1 +
src/outpacket.c | 11 +++++++++++
src/rfc3315.c | 29 ++++++++++++++---------------
3 files changed, 26 insertions(+), 15 deletions(-)
diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index 27ff86a..0749260 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -1563,6 +1563,7 @@ void put_opt6_long(unsigned int val);
void put_opt6_short(unsigned int val);
void put_opt6_char(unsigned int val);
void put_opt6_string(char *s);
+void put_msgtype6(unsigned int val);
#endif
/* radv.c */
diff --git a/src/outpacket.c b/src/outpacket.c
index d20bd33..1c8f1bc 100644
--- a/src/outpacket.c
+++ b/src/outpacket.c
@@ -115,4 +115,15 @@ void put_opt6_string(char *s)
put_opt6(s, strlen(s));
}
+void put_msgtype6(unsigned int val)
+{
+ if (outpacket_counter == 0)
+ put_opt6_char(val);
+ else
+ {
+ unsigned char *p = daemon->outpacket.iov_base;
+ *p = val;
+ }
+}
+
#endif
diff --git a/src/rfc3315.c b/src/rfc3315.c
index 554b1fe..1f1aad8 100644
--- a/src/rfc3315.c
+++ b/src/rfc3315.c
@@ -116,7 +116,6 @@ static int dhcp6_maybe_relay(struct state *state, void *inbuff, size_t sz,
void *end = inbuff + sz;
void *opts = inbuff + 34;
int msg_type = *((unsigned char *)inbuff);
- unsigned char *outmsgtypep;
void *opt;
struct dhcp_vendor *vendor;
@@ -178,9 +177,9 @@ static int dhcp6_maybe_relay(struct state *state, void *inbuff, size_t sz,
return 0;
/* copy header stuff into reply message and set type to reply */
- if (!(outmsgtypep = put_opt6(inbuff, 34)))
+ if (!put_opt6(inbuff, 34))
return 0;
- *outmsgtypep = DHCP6RELAYREPL;
+ put_msgtype6(DHCP6RELAYREPL);
/* look for relay options and set tags if found. */
for (vendor = daemon->dhcp_vendors; vendor; vendor = vendor->next)
@@ -249,7 +248,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
struct dhcp_netid *tagif;
struct dhcp_config *config = NULL;
struct dhcp_netid known_id, iface_id, v6_id;
- unsigned char *outmsgtypep;
+ unsigned char *xid;
struct dhcp_vendor *vendor;
struct dhcp_context *context_tmp;
struct dhcp_mac *mac_opt;
@@ -286,10 +285,10 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
state->tags = &v6_id;
/* copy over transaction-id, and save pointer to message type */
- if (!(outmsgtypep = put_opt6(inbuff, 4)))
+ if (!(xid = put_opt6(inbuff, 4)))
return 0;
start_opts = save_counter(-1);
- state->xid = outmsgtypep[3] | outmsgtypep[2] << 8 | outmsgtypep[1] << 16;
+ state->xid = xid[3] | xid[2] << 8 | xid[1] << 16;
/* We're going to be linking tags from all context we use.
mark them as unused so we don't link one twice and break the list */
@@ -336,7 +335,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
(msg_type == DHCP6REQUEST || msg_type == DHCP6RENEW || msg_type == DHCP6RELEASE || msg_type == DHCP6DECLINE))
{
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6USEMULTI);
put_opt6_string("Use multicast");
@@ -600,11 +599,11 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
struct dhcp_netid *solicit_tags;
struct dhcp_context *c;
- *outmsgtypep = DHCP6ADVERTISE;
+ put_msgtype6(DHCP6ADVERTISE);
if (opt6_find(state->packet_options, state->end, OPTION6_RAPID_COMMIT, 0))
{
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
state->lease_allocate = 1;
o = new_opt6(OPTION6_RAPID_COMMIT);
end_opt6(o);
@@ -876,7 +875,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
int start = save_counter(-1);
/* set reply message type */
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
state->lease_allocate = 1;
log6_quiet(state, "DHCPREQUEST", NULL, ignore ? _("ignored") : NULL);
@@ -992,7 +991,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
case DHCP6RENEW:
{
/* set reply message type */
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
log6_quiet(state, "DHCPRENEW", NULL, NULL);
@@ -1104,7 +1103,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
int good_addr = 0;
/* set reply message type */
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
log6_quiet(state, "DHCPCONFIRM", NULL, NULL);
@@ -1168,7 +1167,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
log6_quiet(state, "DHCPINFORMATION-REQUEST", NULL, ignore ? _("ignored") : state->hostname);
if (ignore)
return 0;
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
tagif = add_options(state, 1);
break;
}
@@ -1177,7 +1176,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
case DHCP6RELEASE:
{
/* set reply message type */
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
log6_quiet(state, "DHCPRELEASE", NULL, NULL);
@@ -1242,7 +1241,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
case DHCP6DECLINE:
{
/* set reply message type */
- *outmsgtypep = DHCP6REPLY;
+ put_msgtype6(DHCP6REPLY);
log6_quiet(state, "DHCPDECLINE", NULL, NULL);
--
2.34.1

16
SPECS/dnsmasq.spec
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@ -13,7 +13,7 @@
Name: dnsmasq
Version: 2.79
Release: 21%{?extraversion:.%{extraversion}}%{?dist}
Release: 23%{?extraversion:.%{extraversion}}%{?dist}
Summary: A lightweight DHCP/caching DNS server
License: GPLv2 or GPLv3
@ -73,6 +73,11 @@ Patch33: dnsmasq-2.86-dhcpv6-client-arch.patch
# Similar functionality is implemented since 2.86 in upstream, but introduced
# several regressions. This implements just limited change in different way.
Patch34: dnsmasq-2.79-server-domain-rh1919894.patch
Patch35: dnsmasq-2.87-CVE-2022-0934.patch
# http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=dded78b2338147daf69064d6d48c16b12744e441
Patch36: dnsmasq-2.81-option6-ntp-server-suboption.patch
# https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;h=3052ce208acf602f0163166dcefb7330d537cedb
Patch37: dnsmasq-2.81-linux-SIOCGSTAMP.patch
# This is workaround to nettle bug #1549190
# https://bugzilla.redhat.com/show_bug.cgi?id=1549190
@ -140,6 +145,9 @@ server's leases.
%patch32 -p1 -b .rh1998448
%patch33 -p1 -b .dhcpv6-client-arch
%patch34 -p1 -b .rh1919894
%patch35 -p1 -b .CVE-2022-0934
%patch36 -p1 -b .rh2049691
%patch37 -p1 -b .SIOCGSTAMP
# use /var/lib/dnsmasq instead of /var/lib/misc
for file in dnsmasq.conf.example man/dnsmasq.8 man/es/dnsmasq.8 src/config.h; do
@ -239,6 +247,12 @@ install -Dpm 644 %{SOURCE2} %{buildroot}%{_sysusersdir}/dnsmasq.conf
%{_mandir}/man1/dhcp_*
%changelog
* Thu May 12 2022 Petr Menšík <pemensik@redhat.com> - 2.79-23
- Add IPv6 ntp-server suboptions support (#2049691)
* Fri Mar 25 2022 Petr Menšík <pemensik@redhat.com> - 2.79-22
- Prevent use after free in dhcp6_no_relay (CVE-2022-0934)
* Thu Jan 27 2022 Petr Menšík <pemensik@redhat.com> - 2.79-21
- Send queries only to best domain-specific server (#1919894)