connman :fix CVE-2025-32743

In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c
can be NULL or an empty string when the TC (Truncated) bit is set in
a DNS response. This allows attackers to cause a denial of service
(application crash) or possibly execute arbitrary code, because those
lookup values lead to incorrect length calculations and incorrect
memcpy operations.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2025-32743

Upstream-patch:
https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=d90b911f6760959bdf1393c39fe8d1118315490f

Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

diff --git a/meta/recipes-connectivity/connman/connman/CVE-2025-32743.patch b/meta/recipes-connectivity/connman/connman/CVE-2025-32743.patch
new file mode 100644 (file)
index 0000000..c114589
--- /dev/null
+++ b/meta/recipes-connectivity/connman/connman/CVE-2025-32743.patch
@@ -0,0 +1,48 @@
+From d90b911f6760959bdf1393c39fe8d1118315490f Mon Sep 17 00:00:00 2001
+From: Praveen Kumar <praveen.kumar@windriver.com>
+Date: Thu, 24 Apr 2025 11:39:29 +0000
+Subject: [PATCH] dnsproxy: Fix NULL/empty lookup causing potential crash
+
+In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c
+can be NULL or an empty string when the TC (Truncated) bit is set in
+a DNS response. This allows attackers to cause a denial of service
+(application crash) or possibly execute arbitrary code, because those
+lookup values lead to incorrect length calculations and incorrect
+memcpy operations.
+
+This patch includes a check to make sure loookup value is valid before
+using it. This helps avoid unexpected value when the input is empty or
+incorrect.
+
+Fixes: CVE-2025-32743
+
+CVE: CVE-2025-32743
+
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=d90b911f6760959bdf1393c39fe8d1118315490f]
+
+Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
+---
+ src/dnsproxy.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/src/dnsproxy.c b/src/dnsproxy.c
+index f28a5d7..7ee26d9 100644
+--- a/src/dnsproxy.c
++++ b/src/dnsproxy.c
+@@ -1685,8 +1685,13 @@ static int ns_resolv(struct server_data *server, struct request_data *req,
+                               gpointer request, gpointer name)
+ {
+       int sk = -1;
++      int err;
+       const char *lookup = (const char *)name;
+-      int err = ns_try_resolv_from_cache(req, request, lookup);
++
++      if (!lookup || strlen(lookup) == 0)
++              return -EINVAL;
++
++      err = ns_try_resolv_from_cache(req, request, lookup);
+
+       if (err > 0)
+               /* cache hit */
+--
+2.40.0

diff --git a/meta/recipes-connectivity/connman/connman_1.43.bb b/meta/recipes-connectivity/connman/connman_1.43.bb
index 1100599490a32ad2334bbfb183068a60f72ebb88..02abda568f43c12a37dc85ac3c28835b15f77e52 100644 (file)
--- a/meta/recipes-connectivity/connman/connman_1.43.bb
+++ b/meta/recipes-connectivity/connman/connman_1.43.bb
@@ -6,6 +6,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/network/${BPN}/${BP}.tar.xz \
            file://connman \
            file://no-version-scripts.patch \
            file://0002-resolve-musl-does-not-implement-res_ninit.patch \
+           file://CVE-2025-32743.patch \
            "