connman: Fix CVE-2025-32366

In ConnMan through 1.44, parse_rr in dnsproxy.c has a memcpy length
that depends on an RR RDLENGTH value, i.e., *rdlen=ntohs(rr->rdlen)
and memcpy(response+offset,*end,*rdlen) without a check for whether
the sum of *end and *rdlen exceeds max. Consequently, *rdlen may be
larger than the amount of remaining packet data in the current state
of parsing. Values of stack memory locations may be sent over the
network in a response.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2025-32366

Upstream-patch:
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=8d3be0285f1d4667bfe85dba555c663eb3d704b4

(From OE-Core rev: 548eddd84f23c6cb0352b9a692144050da8ba37a)

Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 42 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/connman/connman/CVE-2025-32366.patch b/meta/recipes-connectivity/connman/connman/CVE-2025-32366.patch
new file mode 100644
index 0000000000..62f07e707a
--- /dev/null
+++ b/meta/recipes-connectivity/connman/connman/CVE-2025-32366.patch
@@ -0,0 +1,41 @@
+From 8d3be0285f1d4667bfe85dba555c663eb3d704b4 Mon Sep 17 00:00:00 2001
+From: Yoonje Shin <ioerts@kookmin.ac.kr>
+Date: Mon, 12 May 2025 10:48:18 +0200
+Subject: [PATCH] dnsproxy: Address CVE-2025-32366 vulnerability
+
+In Connman parse_rr in dnsproxy.c has a memcpy length
+that depends on an RR RDLENGTH value (i.e., *rdlen=ntohs(rr->rdlen)
+and memcpy(response+offset,*end,*rdlen)). Here, rdlen may be larger
+than the amount of remaining packet data in the current state of
+parsing. As a result, values of stack memory locations may be sent
+over the network in a response.
+
+This patch adds a check to ensure that (*end + *rdlen) does not exceed
+the valid range. If the condition is violated, the function returns
+-EINVAL.
+
+CVE: CVE-2025-32366
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=8d3be0285f1d4667bfe85dba555c663eb3d704b4]
+
+Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
+---
+ src/dnsproxy.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/dnsproxy.c b/src/dnsproxy.c
+index 7ee26d9..1dd2f7f 100644
+--- a/src/dnsproxy.c
++++ b/src/dnsproxy.c
+@@ -998,6 +998,9 @@ static int parse_rr(const unsigned char *buf, const unsigned char *start,
+        if ((offset + *rdlen) > *response_size)
+                return -ENOBUFS;
+
++       if ((*end + *rdlen) > max)
++               return -EINVAL;
++
+        memcpy(response + offset, *end, *rdlen);
+
+        *end += *rdlen;
+--
+2.40.0
diff --git a/meta/recipes-connectivity/connman/connman_1.44.bb b/meta/recipes-connectivity/connman/connman_1.44.bb
index b25a435577..02c5be929e 100644
--- a/meta/recipes-connectivity/connman/connman_1.44.bb
+++ b/meta/recipes-connectivity/connman/connman_1.44.bb
@@ -22,6 +22,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/network/${BPN}/${BP}.tar.xz \
            file://connman \
            file://0002-resolve-musl-does-not-implement-res_ninit.patch \
            file://CVE-2025-32743.patch \
+           file://CVE-2025-32366.patch \
            "
 
 SRC_URI[sha256sum] = "2be2b00321632b775f9eff713acd04ef21e31fbf388f6ebf45512ff4289574ff"