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strongswan: Fix CVE-2026-25075

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Pick patch according to [1]

[1] https://download.strongswan.org/security/CVE-2026-25075/
[2] https://www.strongswan.org/blog/2026/03/23/strongswan-vulnerability-(cve-2026-25075).html

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Anuj Mittal <anuj.mittal@oss.qualcomm.com>
This commit is contained in:
Vijay Anusuri
2026-04-02 17:28:57 +05:30
committed by Anuj Mittal
parent 4feb9130b0
commit 1ad0d777d1
2 changed files with 51 additions and 0 deletions
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meta-networking/recipes-support/strongswan/strongswan/CVE-2026-25075.patch
+50
View File
@@ -0,0 +1,50 @@
From d4b3c39776f06948d875614a0eddea9561159f2a Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Thu, 5 Mar 2026 12:43:12 +0100
Subject: [PATCH] eap-ttls: Prevent crash if AVP length header field is invalid
The length field in the AVP header includes the 8 bytes of the header
itself. Not checking for that and later subtracting it causes an
integer underflow that usually triggers a crash when accessing a
NULL pointer that resulted from the failing chunk_alloc() call because
of the high value.
The attempted allocations for invalid lengths (0-7) are 0xfffffff8,
0xfffffffc, or 0x100000000 (0 on 32-bit hosts), so this doesn't result
in a buffer overflow even if the allocation succeeds.
Fixes: 79f2102cb442 ("implemented server side support for EAP-TTLS")
Fixes: CVE-2026-25075
Upstream-Status: Backport [https://download.strongswan.org/security/CVE-2026-25075/strongswan-4.5.0-6.0.4_eap_ttls_avp_len.patch]
CVE: CVE-2026-25075
Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
---
src/libcharon/plugins/eap_ttls/eap_ttls_avp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c b/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c
index 06389f7ca73e..2983bd021ded 100644
--- a/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c
+++ b/src/libcharon/plugins/eap_ttls/eap_ttls_avp.c
@@ -119,7 +119,7 @@ METHOD(eap_ttls_avp_t, process, status_t,
chunk_free(&this->input);
this->inpos = 0;
- if (!success)
+ if (!success || avp_len < AVP_HEADER_LEN)
{
DBG1(DBG_IKE, "received invalid AVP header");
return FAILED;
@@ -130,7 +130,7 @@ METHOD(eap_ttls_avp_t, process, status_t,
return FAILED;
}
this->process_header = FALSE;
- this->data_len = avp_len - 8;
+ this->data_len = avp_len - AVP_HEADER_LEN;
this->input = chunk_alloc(this->data_len + (4 - avp_len) % 4);
}
--
2.43.0
meta-networking/recipes-support/strongswan/strongswan_5.9.14.bb
+1
View File
@@ -10,6 +10,7 @@ DEPENDS:append = "${@bb.utils.contains('DISTRO_FEATURES', 'tpm2', ' tpm2-tss',
SRC_URI = "https://download.strongswan.org/strongswan-${PV}.tar.bz2 \
file://CVE-2025-62291.patch \
file://CVE-2026-25075.patch \
"
SRC_URI[sha256sum] = "728027ddda4cb34c67c4cec97d3ddb8c274edfbabdaeecf7e74693b54fc33678"