This fixes the following security problems in dnsmasq:
* CVE-2020-25681:
Dnsmasq versions before 2.83 is susceptible to a heap-based buffer
overflow in sort_rrset() when DNSSEC is used. This can allow a remote
attacker to write arbitrary data into target device's memory that can
lead to memory corruption and other unexpected behaviors on the target
device.
* CVE-2020-25682:
Dnsmasq versions before 2.83 is susceptible to buffer overflow in
extract_name() function due to missing length check, when DNSSEC is
enabled. This can allow a remote attacker to cause memory corruption
on the target device.
* CVE-2020-25683:
Dnsmasq version before 2.83 is susceptible to a heap-based buffer
overflow when DNSSEC is enabled. A remote attacker, who can create
valid DNS replies, could use this flaw to cause an overflow in a heap-
allocated memory. This flaw is caused by the lack of length checks in
rtc1035.c:extract_name(), which could be abused to make the code
execute memcpy() with a negative size in get_rdata() and cause a crash
in Dnsmasq, resulting in a Denial of Service.
* CVE-2020-25684:
A lack of proper address/port check implemented in Dnsmasq version <
2.83 reply_query function makes forging replies easier to an off-path
attacker.
* CVE-2020-25685:
A lack of query resource name (RRNAME) checks implemented in Dnsmasq's
versions before 2.83 reply_query function allows remote attackers to
spoof DNS traffic that can lead to DNS cache poisoning.
* CVE-2020-25686:
Multiple DNS query requests for the same resource name (RRNAME) by
Dnsmasq versions before 2.83 allows for remote attackers to spoof DNS
traffic, using a birthday attack (RFC 5452), that can lead to DNS
cache poisoning.
* CVE-2020-25687:
Dnsmasq versions before 2.83 is vulnerable to a heap-based buffer
overflow with large memcpy in sort_rrset() when DNSSEC is enabled. A
remote attacker, who can create valid DNS replies, could use this flaw
to cause an overflow in a heap-allocated memory. This flaw is caused
by the lack of length checks in rtc1035.c:extract_name(), which could
be abused to make the code execute memcpy() with a negative size in
sort_rrset() and cause a crash in dnsmasq, resulting in a Denial of
Service.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
include $(TOPDIR)/rules.mk
PKG_NAME:=dnsmasq
-PKG_UPSTREAM_VERSION:=2.82
+PKG_UPSTREAM_VERSION:=2.83
PKG_VERSION:=$(subst test,~~test,$(subst rc,~rc,$(PKG_UPSTREAM_VERSION)))
-PKG_RELEASE:=10
+PKG_RELEASE:=1
PKG_SOURCE:=$(PKG_NAME)-$(PKG_UPSTREAM_VERSION).tar.xz
PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq
-PKG_HASH:=84523646f3116bb5e1151efb66e645030f6e6a8256f29aab444777a343ebc132
+PKG_HASH:=ffc1f7e8b05e22d910b9a71d09f1128197292766dc7c54cb7018a1b2c3af4aea
PKG_LICENSE:=GPL-2.0
PKG_LICENSE_FILES:=COPYING
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
-@@ -1112,7 +1112,7 @@ extern struct daemon {
+@@ -1125,7 +1125,7 @@ extern struct daemon {
int inotifyfd;
#endif
#if defined(HAVE_LINUX_NETWORK)
#elif defined(HAVE_BSD_NETWORK)
int dhcp_raw_fd, dhcp_icmp_fd, routefd;
#endif
-@@ -1292,9 +1292,6 @@ int read_write(int fd, unsigned char *pa
+@@ -1306,9 +1306,6 @@ int read_write(int fd, unsigned char *pa
void close_fds(long max_fd, int spare1, int spare2, int spare3);
int wildcard_match(const char* wildcard, const char* match);
int wildcard_matchn(const char* wildcard, const char* match, int num);