ez-ipupdate: patch CVE-2003-0887

Details: https://nvd.nist.gov/vuln/detail/CVE-2003-0887

The vulnerability is about the default (example) configurations,
which place cache files into the /tmp folder, that is world-writeable.
The recommendation would be to place them to a more secure folder.

The recipe however does not install these example configurations,
and as such it is not vulnerable either.

Just to make sure, patch these folders to a non-tmp folder
(and also install that folder, empty).

Some more discussion about the vulnerability:
https://bugzilla.suse.com/show_bug.cgi?id=48161

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 165 insertions, 0 deletions

diff --git a/meta-networking/recipes-connectivity/ez-ipupdate/ez-ipupdate_3.0.11b7.bb b/meta-networking/recipes-connectivity/ez-ipupdate/ez-ipupdate_3.0.11b7.bb
index 42ecf9bac4..7a392b2c23 100644
--- a/meta-networking/recipes-connectivity/ez-ipupdate/ez-ipupdate_3.0.11b7.bb
+++ b/meta-networking/recipes-connectivity/ez-ipupdate/ez-ipupdate_3.0.11b7.bb
@@ -10,8 +10,15 @@ SRC_URI = "http://sourceforge.net/projects/ez-ipupdate/files/${BPN}/${PV}/${BPN}
            file://conf_file.c.patch \
            file://wformat.patch \
            file://0001-ez-ipupdate-Include-time.h-for-time-API-prototype.patch \
+           file://CVE-2003-0887.patch \
            "
 SRC_URI[md5sum] = "525be4550b4461fdf105aed8e753b020"
 SRC_URI[sha256sum] = "a15ec0dc0b78ec7578360987c68e43a67bc8d3591cbf528a323588830ae22c20"
 
 inherit autotools pkgconfig
+
+do_install:append(){
+    install -m 0744 -d ${D}${localstatedir}/lib/ez-ipupdate
+}
+
+FILES:${PN} += "${localstatedir}/lib/ez-ipupdate"
diff --git a/meta-networking/recipes-connectivity/ez-ipupdate/files/CVE-2003-0887.patch b/meta-networking/recipes-connectivity/ez-ipupdate/files/CVE-2003-0887.patch
new file mode 100644
index 0000000000..53aa355008
--- /dev/null
+++ b/meta-networking/recipes-connectivity/ez-ipupdate/files/CVE-2003-0887.patch
@@ -0,0 +1,158 @@
+From cd8fa738b0ed3b5fb89ac00068fdc2e20c1b6169 Mon Sep 17 00:00:00 2001
+From: Gyorgy Sarvari <skandigraun@gmail.com>
+Date: Mon, 2 Feb 2026 14:03:01 +0100
+Subject: [PATCH] CVE-2003-0887
+
+The vulnerability is about exmaple config files placing cache files
+into a world-writable directory (/tmp) instead of something more
+secure.
+
+This patch changes this path to /var/lib/ez-ipupdate, which is
+not world-writable by default.
+
+CVE: CVE-2003-0887
+Upstream-Status: Inactive-Upstream [lastcommit: 2002]
+Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
+---
+ example-dhs.conf       | 2 +-
+ example-dyndns.conf    | 2 +-
+ example-dyns.conf      | 2 +-
+ example-easydns.conf   | 2 +-
+ example-gnudip.conf    | 2 +-
+ example-heipv6tb.conf  | 2 +-
+ example-justlinux.conf | 2 +-
+ example-ods.conf       | 2 +-
+ example-pgpow.conf     | 2 +-
+ example-tzo.conf       | 2 +-
+ 10 files changed, 10 insertions(+), 10 deletions(-)
+
+diff --git a/example-dhs.conf b/example-dhs.conf
+index 3fe9a04..f976ae5 100755
+--- a/example-dhs.conf
++++ b/example-dhs.conf
+@@ -11,7 +11,7 @@ host=mydomain.whatever.com
+ interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-dyndns.conf b/example-dyndns.conf
+index f539dec..84b4807 100755
+--- a/example-dyndns.conf
++++ b/example-dyndns.conf
+@@ -19,7 +19,7 @@ max-interval=2073600
+ #cache-file=/etc/ez-ipupdate.cache.eth1
+ 
+ # for the mean time we'll just use a cache file in the temp directory
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-dyns.conf b/example-dyns.conf
+index 868768d..856a4d7 100644
+--- a/example-dyns.conf
++++ b/example-dyns.conf
+@@ -11,7 +11,7 @@ host=myhost
+ #interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-#cache-file=/tmp/ez-ipupdate.cache
++#cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-easydns.conf b/example-easydns.conf
+index 0ff20da..15d9b78 100755
+--- a/example-easydns.conf
++++ b/example-easydns.conf
+@@ -11,7 +11,7 @@ host=mydomain.whatever.com
+ interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-gnudip.conf b/example-gnudip.conf
+index 3b2fb63..d09df1f 100755
+--- a/example-gnudip.conf
++++ b/example-gnudip.conf
+@@ -15,7 +15,7 @@ max-interval=2073600
+ #address=0.0.0.0
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-heipv6tb.conf b/example-heipv6tb.conf
+index e31aa9c..3ebc822 100644
+--- a/example-heipv6tb.conf
++++ b/example-heipv6tb.conf
+@@ -18,7 +18,7 @@ max-interval=2073600
+ #cache-file=/etc/ez-ipupdate.cache.eth1
+ 
+ # for the mean time we'll just use a cache file in the temp directory
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-justlinux.conf b/example-justlinux.conf
+index 0afeb2c..28b3327 100755
+--- a/example-justlinux.conf
++++ b/example-justlinux.conf
+@@ -11,7 +11,7 @@ host=mydomain.penguinpowered.com
+ interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-ods.conf b/example-ods.conf
+index d0ff889..7b16f2c 100755
+--- a/example-ods.conf
++++ b/example-ods.conf
+@@ -11,7 +11,7 @@ host=mydomain.ods.org
+ interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-pgpow.conf b/example-pgpow.conf
+index 29a92d6..81e351b 100755
+--- a/example-pgpow.conf
++++ b/example-pgpow.conf
+@@ -11,7 +11,7 @@ host=mydomain.penguinpowered.com
+ interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it
+diff --git a/example-tzo.conf b/example-tzo.conf
+index 2a71db3..10b8dc4 100755
+--- a/example-tzo.conf
++++ b/example-tzo.conf
+@@ -15,7 +15,7 @@ max-interval=2073600
+ interface=eth1
+ 
+ # if you use run-as ensure the user has permission to write this file
+-cache-file=/tmp/ez-ipupdate.cache
++cache-file=/var/lib/ez-ipupdate/ez-ipupdate.cache
+ 
+ # uncomment this once you have everything working how you want and you are
+ # ready to have ez-ipupdate running in the background all the time. to stop it