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package/connman: fix CVE-2025-32743

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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.

Fixes:
https://www.cve.org/CVERecord?id=CVE-2025-32743

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
[Julien: add link to cve]
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 6c4da559cc)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
This commit is contained in:
Dario Binacchi
2025-05-12 18:32:53 +02:00
committed by Thomas Perale
parent 818c56920e
commit 10a6440b98
2 changed files with 49 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
package/connman/0001-dnsproxy-Fix-NULL-empty-lookup-causing-potential-cra.patch Normal file
View File

@@ -0,0 +1,46 @@
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
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Upstream: https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=d90b911f6760959bdf1393c39fe8d1118315490f
---
src/dnsproxy.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/dnsproxy.c b/src/dnsproxy.c
index f28a5d7551a4..7ee26d9ff886 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 */
--
2.43.0

3
package/connman/connman.mk
View File

@@ -13,6 +13,9 @@ CONNMAN_LICENSE = GPL-2.0
CONNMAN_LICENSE_FILES = COPYING
CONNMAN_CPE_ID_VENDOR = intel
# 0001-dnsproxy-Fix-NULL-empty-lookup-causing-potential-cra.patch
CONNMAN_IGNORE_CVES += CVE-2025-32743
CONNMAN_CONF_OPTS = --with-dbusconfdir=/etc
ifeq ($(BR2_INIT_SYSTEMD),y)