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| author |   Peter Marko <peter.marko@siemens.com> | 2023-03-24 14:35:42 +0100 |
|---|---|---|
| committer |   Armin Kuster <akuster808@gmail.com> | 2023-03-25 09:07:27 -0400 |
| commit | b4ff73905b887cf7c489248de80dab2721090cbf (patch) | |
| tree | 9c7077ee1d465b1c436a46cc49743a026b709ce4 | |
| parent | e96e13f7c2cb7a589ec1c80ac925a339c8c4f4e3 (diff) | |
| download | meta-openembedded-b4ff73905b887cf7c489248de80dab2721090cbf.tar.gz | |
dnsmasq: fix CVE-2023-28450
The patch is modified by removing irrelevant and conflicting
CHANGELOG entry.
Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
| -rw-r--r-- | meta-networking/recipes-support/dnsmasq/dnsmasq.inc | 1 | ||||
| -rw-r--r-- | meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch | 48 |
2 files changed, 49 insertions, 0 deletions
diff --git a/meta-networking/recipes-support/dnsmasq/dnsmasq.inc b/meta-networking/recipes-support/dnsmasq/dnsmasq.inc index a8ff21a125..9e0f529ec1 100644 --- a/meta-networking/recipes-support/dnsmasq/dnsmasq.inc +++ b/meta-networking/recipes-support/dnsmasq/dnsmasq.inc @@ -14,6 +14,7 @@ SRC_URI = "http://www.thekelleys.org.uk/dnsmasq/${@['archive/', ''][float(d.getV file://dnsmasq-resolvconf.service \ file://dnsmasq-noresolvconf.service \ file://dnsmasq-resolved.conf \ + file://CVE-2023-28450.patch \ " inherit pkgconfig update-rc.d systemd diff --git a/meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch b/meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch new file mode 100644 index 0000000000..129c9043e8 --- /dev/null +++ b/meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch @@ -0,0 +1,48 @@ +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. + +http://www.dnsflagday.net/2020/ refers. + +Thanks to Xiang Li for the prompt. + +CVE: CVE-2023-28450 +Upstream-Status: Backport [https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=eb92fb32b746f2104b0f370b5b295bb8dd4bd5e5] + +Signed-off-by: Peter Marko <peter.marko@siemens.com> +--- + man/dnsmasq.8 | 3 ++- + src/config.h | 2 +- + 2 files changed, 3 insertions(+), 2 deletions(-) + +diff --git a/man/dnsmasq.8 b/man/dnsmasq.8 +index 41e2e04..5acb935 100644 +--- a/man/dnsmasq.8 ++++ b/man/dnsmasq.8 +@@ -183,7 +183,8 @@ 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 1e7b30f..37b374e 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 1232 /* "go anywhere" UDP packet size, see https://dnsflagday.net/2020/ */ + #define KEYBLOCK_LEN 40 /* choose to minimise fragmentation when storing DNSSEC keys */ + #define DNSSEC_WORK 50 /* Max number of queries to validate one question */ +-- +2.20.1 + |