Ankur Tyagi authored and Anuj Mittal committed 2026-10-06 09:50:47 +05:30
1 parent dd0ba33ed2
commit e228e7711e
2 files changed
+38

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@@ -0,0 +1,37 @@
From 13aa926cad7ec7f668249b6513c938b8c2e95af4 Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Thu, 4 Jun 2026 10:00:02 +0200
Subject: [PATCH] eap-aka: Only accept AKA-Synchronization-Failure if expected
This fixes a NULL-pointer dereference if the client sends such an error
before the server issued a challenge and allocated this->rand.
Fixes: 26e246769224 ("ported EAP-AKA branch into trunk")
Fixes: 4735965fc048 ("EAP servers check if the received EAP message was expected")
Fixes: CVE-2026-78126
CVE: CVE-2026-78126
Upstream-Status: Backport [https://github.com/strongswan/strongswan/commit/7bedb451346261370256d390a8c155b86e4b455d]
Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
---
src/libcharon/plugins/eap_aka/eap_aka_server.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/libcharon/plugins/eap_aka/eap_aka_server.c b/src/libcharon/plugins/eap_aka/eap_aka_server.c
index 0712ccc..95d4b03 100644
--- a/src/libcharon/plugins/eap_aka/eap_aka_server.c
+++ b/src/libcharon/plugins/eap_aka/eap_aka_server.c
@@ -505,6 +505,12 @@ static status_t process_synchronize(private_eap_aka_server_t *this,
simaka_attribute_t type;
chunk_t data, auts = chunk_empty;
+ if (this->pending != AKA_CHALLENGE)
+ {
+ DBG1(DBG_IKE, "received %N, but not expected",
+ simaka_subtype_names, AKA_SYNCHRONIZATION_FAILURE);
+ return FAILED;
+ }
if (this->synchronized)
{
DBG1(DBG_IKE, "received %N, but peer did already resynchronize",
@@ -12,6 +12,7 @@ SRC_URI = "https://download.strongswan.org/strongswan-${PV}.tar.bz2 \
file://CVE-2026-47895.patch \
file://CVE-2026-78123.patch \
file://CVE-2026-78124.patch \
file://CVE-2026-78126.patch \
"
SRC_URI[sha256sum] = "07df7cedae56a7f3bb07e66d21a1f9f87e961db70e99184e11d3819413e4f87c"