diff options
Diffstat (limited to 'meta-openembedded/meta-networking/recipes-support/dnsmasq')
-rw-r--r-- | meta-openembedded/meta-networking/recipes-support/dnsmasq/dnsmasq_2.89.bb | 1 | ||||
-rw-r--r-- | meta-openembedded/meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch | 48 |
2 files changed, 49 insertions, 0 deletions
diff --git a/meta-openembedded/meta-networking/recipes-support/dnsmasq/dnsmasq_2.89.bb b/meta-openembedded/meta-networking/recipes-support/dnsmasq/dnsmasq_2.89.bb index 1a009f2da3..684eb44320 100644 --- a/meta-openembedded/meta-networking/recipes-support/dnsmasq/dnsmasq_2.89.bb +++ b/meta-openembedded/meta-networking/recipes-support/dnsmasq/dnsmasq_2.89.bb @@ -17,6 +17,7 @@ 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 \ " SRC_URI[sha256sum] = "8651373d000cae23776256e83dcaa6723dee72c06a39362700344e0c12c4e7e4" diff --git a/meta-openembedded/meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch b/meta-openembedded/meta-networking/recipes-support/dnsmasq/files/CVE-2023-28450.patch new file mode 100644 index 0000000000..129c9043e8 --- /dev/null +++ b/meta-openembedded/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 + |