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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.

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

(From OE-Core rev: 9558ec2091964556b47b0909c5d243aee5bafb6f)

Signed-off-by: Praveen Kumar <praveen.kumar@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Praveen Kumar
2025-05-07 06:51:15 +00:00
committed by Steve Sakoman
parent e4df627b22
commit 86ea2699ac
2 changed files with 49 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-connectivity/connman/connman/CVE-2025-32743.patch
+48
View File
@@ -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 7ebffbc..1a5a4f3 100644
--- a/src/dnsproxy.c
+++ b/src/dnsproxy.c
@@ -1669,8 +1669,13 @@ 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
meta/recipes-connectivity/connman/connman_1.42.bb
+1
View File
@@ -7,6 +7,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/network/${BPN}/${BP}.tar.xz \
file://no-version-scripts.patch \ file://no-version-scripts.patch \
file://0001-vpn-Adding-support-for-latest-pppd-2.5.0-release.patch \ file://0001-vpn-Adding-support-for-latest-pppd-2.5.0-release.patch \
file://0001-src-log.c-Include-libgen.h-for-basename-API.patch \ file://0001-src-log.c-Include-libgen.h-for-basename-API.patch \
file://CVE-2025-32743.patch \
" "
SRC_URI:append:libc-musl = " file://0002-resolve-musl-does-not-implement-res_ninit.patch" SRC_URI:append:libc-musl = " file://0002-resolve-musl-does-not-implement-res_ninit.patch"