ofono: fix CVE-2023-4232

A flaw was found in ofono, an Open Source Telephony on Linux. A stack overflow bug
is triggered within the decode_status_report() function during the SMS decoding.
It is assumed that the attack scenario is accessible from a compromised modem,
a malicious base station, or just SMS. There is a bound check for this memcpy
length in decode_submit(), but it was forgotten in decode_status_report().

(From OE-Core rev: 02005c81a55930d9f57d44674cdc5eb6171c8c76)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 31 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/ofono/ofono/CVE-2023-4232.patch b/meta/recipes-connectivity/ofono/ofono/CVE-2023-4232.patch
new file mode 100644
index 0000000000..da714f6a87
--- /dev/null
+++ b/meta/recipes-connectivity/ofono/ofono/CVE-2023-4232.patch
@@ -0,0 +1,30 @@
+From 2ff2da7ac374a790f8b2a0216bcb4e3126498225 Mon Sep 17 00:00:00 2001
+From: "Sicelo A. Mhlongo" <absicsz@gmail.com>
+Date: Wed, 4 Dec 2024 10:18:52 +0200
+Subject: [PATCH] smsutil: check status report fits in buffer
+
+Fixes CVE-2023-4232
+
+CVE: CVE-2023-4232
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/ofono/ofono.git/commit/?id=2ff2da7ac374a790f8b2a0216bcb4e3126498225]
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ src/smsutil.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/smsutil.c b/src/smsutil.c
+index ac89f16c..a706e26f 100644
+--- a/src/smsutil.c
++++ b/src/smsutil.c
+@@ -1088,6 +1088,9 @@ static gboolean decode_status_report(const unsigned char *pdu, int len,
+                if ((len - offset) < expected)
+                        return FALSE;
+
++               if (expected > (int)sizeof(out->status_report.ud))
++                       return FALSE;
++
+                memcpy(out->status_report.ud, pdu + offset, expected);
+        }
+
+--
+2.30.2
diff --git a/meta/recipes-connectivity/ofono/ofono_1.34.bb b/meta/recipes-connectivity/ofono/ofono_1.34.bb
index 9f11af9236..8a298bfade 100644
--- a/meta/recipes-connectivity/ofono/ofono_1.34.bb
+++ b/meta/recipes-connectivity/ofono/ofono_1.34.bb
@@ -26,6 +26,7 @@ SRC_URI = "\
     file://CVE-2024-7547.patch \
     file://CVE-2024-7540_CVE-2024-7541_CVE-2024-7542.patch \
     file://CVE-2024-7537.patch \
+    file://CVE-2023-4232.patch \
 "
 SRC_URI[sha256sum] = "c0b96d3013447ec2bcb74579bef90e4e59c68dbfa4b9c6fbce5d12401a43aac7"