net-snmp: Fix for CVE-2025-68615

Upstream-Status: Backport from https://github.com/net-snmp/net-snmp/commit/b4e6f826d9ddcc2d72eac432746807e1234266db

Reference: https://github.com/net-snmp/net-snmp/security/advisories/GHSA-4389-rwqf-q9gq

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>

2 files changed, 34 insertions, 0 deletions

diff --git a/meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2025-68615.patch b/meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2025-68615.patch
new file mode 100644
index 0000000000..1e6c65f0e5
--- /dev/null
+++ b/meta-networking/recipes-protocols/net-snmp/net-snmp/CVE-2025-68615.patch
@@ -0,0 +1,33 @@
+From b4e6f826d9ddcc2d72eac432746807e1234266db Mon Sep 17 00:00:00 2001
+From: Bart Van Assche <bvanassche@acm.org>
+Date: Sun, 2 Nov 2025 14:48:55 -0800
+Subject: [PATCH] snmptrapd: Fix out-of-bounds trapOid[] accesses
+
+Fixes: https://issues.oss-fuzz.com/issues/457106694
+Fixes: https://issues.oss-fuzz.com/issues/458668421
+Fixes: https://issues.oss-fuzz.com/issues/458876071
+
+Upstream-Status: Backport [https://github.com/net-snmp/net-snmp/commit/b4e6f826d9ddcc2d72eac432746807e1234266db]
+CVE: CVE-2025-68615
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ apps/snmptrapd_handlers.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/apps/snmptrapd_handlers.c b/apps/snmptrapd_handlers.c
+index 6cd126f266..afd93ed0fb 100644
+--- a/apps/snmptrapd_handlers.c
++++ b/apps/snmptrapd_handlers.c
+@@ -1112,6 +1112,12 @@ snmp_input(int op, netsnmp_session *session,
+             */
+             if (pdu->trap_type == SNMP_TRAP_ENTERPRISESPECIFIC) {
+                 trapOidLen = pdu->enterprise_length;
++                /*
++                 * Drop packets that would trigger an out-of-bounds trapOid[]
++                 * access.
++                 */
++                if (trapOidLen < 1 || trapOidLen > OID_LENGTH(trapOid) - 2)
++                    return 1;
+                 memcpy(trapOid, pdu->enterprise, sizeof(oid) * trapOidLen);
+                 if (trapOid[trapOidLen - 1] != 0) {
+                     trapOid[trapOidLen++] = 0;
diff --git a/meta-networking/recipes-protocols/net-snmp/net-snmp_5.9.3.bb b/meta-networking/recipes-protocols/net-snmp/net-snmp_5.9.3.bb
index 13dc603bfa..7b7f2be633 100644
--- a/meta-networking/recipes-protocols/net-snmp/net-snmp_5.9.3.bb
+++ b/meta-networking/recipes-protocols/net-snmp/net-snmp_5.9.3.bb
@@ -28,6 +28,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/net-snmp/net-snmp-${PV}.tar.gz \
            file://0001-ac_add_search_path.m4-keep-consistent-between-32bit.patch \
            file://CVE-2022-44792-CVE-2022-44793.patch \
            file://0001-unload_all_mibs-fix-memory-leak-by-freeing-tclist.patch \
+           file://CVE-2025-68615.patch \
            "
 SRC_URI[sha256sum] = "2097f29b7e1bf3f1300b4bae52fa2308d0bb8d5d3998dbe02f9462a413a2ef0a"