diff options
Diffstat (limited to 'meta-networking/recipes-support/dnsmasq/dnsmasq')
| -rw-r--r-- | meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2022-0934.patch | 188 | ||||
| -rw-r--r-- | meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2023-28450.patch | 63 |
2 files changed, 251 insertions, 0 deletions
diff --git a/meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2022-0934.patch b/meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2022-0934.patch new file mode 100644 index 0000000000..b2ef22c06f --- /dev/null +++ b/meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2022-0934.patch @@ -0,0 +1,188 @@ +From 70df9f9104c8f0661966298b58caf794b99e26e1 Mon Sep 17 00:00:00 2001 +From: Hitendra Prajapati <hprajapati@mvista.com> +Date: Thu, 22 Sep 2022 17:39:21 +0530 +Subject: [PATCH] CVE-2022-0934 + +Upstream-Status: Backport [https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=03345ecefeb0d82e3c3a4c28f27c3554f0611b39] +CVE: CVE-2022-0934 +Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com> +--- + CHANGELOG | 2 ++ + src/rfc3315.c | 48 +++++++++++++++++++++++++++--------------------- + 2 files changed, 29 insertions(+), 21 deletions(-) + +diff --git a/CHANGELOG b/CHANGELOG +index 60b08d0..d1d7e41 100644 +--- a/CHANGELOG ++++ b/CHANGELOG +@@ -88,6 +88,8 @@ version 2.81 + + Add --script-on-renewal option. + ++ Fix write-after-free error in DHCPv6 server code. ++ CVE-2022-0934 refers. + + version 2.80 + Add support for RFC 4039 DHCP rapid commit. Thanks to Ashram Method +diff --git a/src/rfc3315.c b/src/rfc3315.c +index b3f0a0a..eef1360 100644 +--- a/src/rfc3315.c ++++ b/src/rfc3315.c +@@ -33,9 +33,9 @@ struct state { + unsigned int mac_len, mac_type; + }; + +-static int dhcp6_maybe_relay(struct state *state, void *inbuff, size_t sz, ++static int dhcp6_maybe_relay(struct state *state, unsigned char *inbuff, size_t sz, + struct in6_addr *client_addr, int is_unicast, time_t now); +-static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_t sz, int is_unicast, time_t now); ++static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbuff, size_t sz, int is_unicast, time_t now); + static void log6_opts(int nest, unsigned int xid, void *start_opts, void *end_opts); + static void log6_packet(struct state *state, char *type, struct in6_addr *addr, char *string); + static void log6_quiet(struct state *state, char *type, struct in6_addr *addr, char *string); +@@ -104,12 +104,12 @@ unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *if + } + + /* This cost me blood to write, it will probably cost you blood to understand - srk. */ +-static int dhcp6_maybe_relay(struct state *state, void *inbuff, size_t sz, ++static int dhcp6_maybe_relay(struct state *state, unsigned char *inbuff, size_t sz, + struct in6_addr *client_addr, int is_unicast, time_t now) + { + void *end = inbuff + sz; + void *opts = inbuff + 34; +- int msg_type = *((unsigned char *)inbuff); ++ int msg_type = *inbuff; + unsigned char *outmsgtypep; + void *opt; + struct dhcp_vendor *vendor; +@@ -259,15 +259,15 @@ static int dhcp6_maybe_relay(struct state *state, void *inbuff, size_t sz, + return 1; + } + +-static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_t sz, int is_unicast, time_t now) ++static int dhcp6_no_relay(struct state *state, int msg_type, unsigned char *inbuff, size_t sz, int is_unicast, time_t now) + { + void *opt; +- int i, o, o1, start_opts; ++ int i, o, o1, start_opts, start_msg; + struct dhcp_opt *opt_cfg; + struct dhcp_netid *tagif; + struct dhcp_config *config = NULL; + struct dhcp_netid known_id, iface_id, v6_id; +- unsigned char *outmsgtypep; ++ unsigned char outmsgtype; + struct dhcp_vendor *vendor; + struct dhcp_context *context_tmp; + struct dhcp_mac *mac_opt; +@@ -296,12 +296,13 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_ + v6_id.next = state->tags; + state->tags = &v6_id; + +- /* copy over transaction-id, and save pointer to message type */ +- if (!(outmsgtypep = put_opt6(inbuff, 4))) ++ start_msg = save_counter(-1); ++ /* copy over transaction-id */ ++ if (!put_opt6(inbuff, 4)) + return 0; + start_opts = save_counter(-1); +- state->xid = outmsgtypep[3] | outmsgtypep[2] << 8 | outmsgtypep[1] << 16; +- ++ state->xid = inbuff[3] | inbuff[2] << 8 | inbuff[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 */ + for (context_tmp = state->context; context_tmp; context_tmp = context_tmp->current) +@@ -347,7 +348,7 @@ 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; ++ outmsgtype = DHCP6REPLY; + o1 = new_opt6(OPTION6_STATUS_CODE); + put_opt6_short(DHCP6USEMULTI); + put_opt6_string("Use multicast"); +@@ -619,11 +620,11 @@ 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; ++ outmsgtype = DHCP6ADVERTISE; + + if (opt6_find(state->packet_options, state->end, OPTION6_RAPID_COMMIT, 0)) + { +- *outmsgtypep = DHCP6REPLY; ++ outmsgtype = DHCP6REPLY; + state->lease_allocate = 1; + o = new_opt6(OPTION6_RAPID_COMMIT); + end_opt6(o); +@@ -809,7 +810,7 @@ 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; ++ outmsgtype = DHCP6REPLY; + state->lease_allocate = 1; + + log6_quiet(state, "DHCPREQUEST", NULL, ignore ? _("ignored") : NULL); +@@ -921,7 +922,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_ + case DHCP6RENEW: + { + /* set reply message type */ +- *outmsgtypep = DHCP6REPLY; ++ outmsgtype = DHCP6REPLY; + + log6_quiet(state, "DHCPRENEW", NULL, NULL); + +@@ -1033,7 +1034,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_ + int good_addr = 0; + + /* set reply message type */ +- *outmsgtypep = DHCP6REPLY; ++ outmsgtype = DHCP6REPLY; + + log6_quiet(state, "DHCPCONFIRM", NULL, NULL); + +@@ -1097,7 +1098,7 @@ 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; ++ outmsgtype = DHCP6REPLY; + tagif = add_options(state, 1); + break; + } +@@ -1106,7 +1107,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_ + case DHCP6RELEASE: + { + /* set reply message type */ +- *outmsgtypep = DHCP6REPLY; ++ outmsgtype = DHCP6REPLY; + + log6_quiet(state, "DHCPRELEASE", NULL, NULL); + +@@ -1171,7 +1172,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_ + case DHCP6DECLINE: + { + /* set reply message type */ +- *outmsgtypep = DHCP6REPLY; ++ outmsgtype = DHCP6REPLY; + + log6_quiet(state, "DHCPDECLINE", NULL, NULL); + +@@ -1251,7 +1252,12 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_ + } + + } +- ++ ++ /* Fill in the message type. Note that we store the offset, ++ not a direct pointer, since the packet memory may have been ++ reallocated. */ ++ ((unsigned char *)(daemon->outpacket.iov_base))[start_msg] = outmsgtype; ++ + log_tags(tagif, state->xid); + log6_opts(0, state->xid, daemon->outpacket.iov_base + start_opts, daemon->outpacket.iov_base + save_counter(-1)); + +-- +2.25.1 + diff --git a/meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2023-28450.patch b/meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2023-28450.patch new file mode 100644 index 0000000000..dd3bd27408 --- /dev/null +++ b/meta-networking/recipes-support/dnsmasq/dnsmasq/CVE-2023-28450.patch @@ -0,0 +1,63 @@ +From eb92fb32b746f2104b0f370b5b295bb8dd4bd5e5 Mon Sep 17 00:00:00 2001 +From: Simon Kelley <simon@thekelleys.org.uk> +Date: Tue, 7 Mar 2023 22:07:46 +0000 +Subject: [PATCH] Set the default maximum DNS UDP packet size to 1232. + +Upstream-Status: Backport [https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=eb92fb32b746f2104b0f370b5b295bb8dd4bd5e5] +CVE: CVE-2023-28450 +Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com> +--- + CHANGELOG | 8 ++++++++ + man/dnsmasq.8 | 3 ++- + src/config.h | 2 +- + 3 files changed, 11 insertions(+), 2 deletions(-) + +diff --git a/CHANGELOG b/CHANGELOG +index d1d7e41..7a560d3 100644 +--- a/CHANGELOG ++++ b/CHANGELOG +@@ -91,6 +91,14 @@ version 2.81 + Fix write-after-free error in DHCPv6 server code. + CVE-2022-0934 refers. + ++ Set the default maximum DNS UDP packet sice to 1232. This ++ has been the recommended value since 2020 because it's the ++ largest value that avoid fragmentation, and fragmentation ++ is just not reliable on the modern internet, especially ++ for IPv6. It's still possible to override this with ++ --edns-packet-max for special circumstances. ++ ++ + version 2.80 + Add support for RFC 4039 DHCP rapid commit. Thanks to Ashram Method + for the initial patch and motivation. +diff --git a/man/dnsmasq.8 b/man/dnsmasq.8 +index f2803f9..3cca4bc 100644 +--- a/man/dnsmasq.8 ++++ b/man/dnsmasq.8 +@@ -168,7 +168,8 @@ to zero completely disables DNS function, leaving only DHCP and/or TFTP. + .TP + .B \-P, --edns-packet-max=<size> + Specify the largest EDNS.0 UDP packet which is supported by the DNS +-forwarder. Defaults to 4096, which is the RFC5625-recommended size. ++forwarder. Defaults to 1232, which is the recommended size following the ++DNS flag day in 2020. Only increase if you know what you are doing. + .TP + .B \-Q, --query-port=<query_port> + Send outbound DNS queries from, and listen for their replies on, the +diff --git a/src/config.h b/src/config.h +index 54f6f48..29ac3e7 100644 +--- a/src/config.h ++++ b/src/config.h +@@ -19,7 +19,7 @@ + #define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */ + #define TCP_MAX_QUERIES 100 /* Maximum number of queries per incoming TCP connection */ + #define TCP_BACKLOG 32 /* kernel backlog limit for TCP connections */ +-#define EDNS_PKTSZ 4096 /* default max EDNS.0 UDP packet from RFC5625 */ ++#define EDNS_PKTSZ 1232 /* default max EDNS.0 UDP packet from from /dnsflagday.net/2020 */ + #define SAFE_PKTSZ 1280 /* "go anywhere" UDP packet size */ + #define KEYBLOCK_LEN 40 /* choose to minimise fragmentation when storing DNSSEC keys */ + #define DNSSEC_WORK 50 /* Max number of queries to validate one question */ +-- +2.18.2 + |