new file mode 100644
@@ -0,0 +1,77 @@
+From d925e4625626a70611a979d4ab231c6e2d313e4a Mon Sep 17 00:00:00 2001
+From: Tobias Brunner <tobias@strongswan.org>
+Date: Wed, 1 Jul 2026 16:24:23 +0200
+Subject: [PATCH] x509: Prevent infinite loop when parsing ietfAttrSyntax in
+ attribute certificates
+
+This is the same issue that was fixed with 407fcca200fd ("asn1-parser:
+Fix CHOICE parsing") for other CHOICE elements. This one was missed and
+can be triggered pre-auth by sending an attribute certificate to a peer.
+Since it's parsed before verifying it, the certificate doesn't have to
+be valid.
+
+For versions older than 5.5.3, this patch requires prior application of
+the fix for CVE-2017-9023, which introduced proper CHOICE handling in
+the ASN.1 parser.
+
+Fixes: a17598bc6992 ("x509: Integrate IETF attribute handling, and obsolete ietf_attributes_t")
+Fixes: CVE-2026-78132
+CVE: CVE-2026-78132
+Upstream-Status: Backport [https://download.strongswan.org/security/CVE-2026-78132/]
+Signed-off-by: Abhishek Bachiphale <Abhishek.Bachiphale@windriver.com>
+
+---
+ src/libstrongswan/plugins/x509/x509_ac.c | 36 +++++++++++-------------
+ 1 file changed, 17 insertions(+), 19 deletions(-)
+
+diff --git a/src/libstrongswan/plugins/x509/x509_ac.c b/src/libstrongswan/plugins/x509/x509_ac.c
+index 4436bc4debef..e8e34749a59c 100644
+--- a/src/libstrongswan/plugins/x509/x509_ac.c
++++ b/src/libstrongswan/plugins/x509/x509_ac.c
+@@ -249,26 +249,24 @@ static void parse_roleSyntax(chunk_t blob, int level0)
+ */
+ static const asn1Object_t ietfAttrSyntaxObjects[] =
+ {
+- { 0, "ietfAttrSyntax", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
+- { 1, "policyAuthority", ASN1_CONTEXT_C_0, ASN1_OPT |
+- ASN1_BODY }, /* 1 */
+- { 1, "end opt", ASN1_EOC, ASN1_END }, /* 2 */
+- { 1, "values", ASN1_SEQUENCE, ASN1_LOOP }, /* 3 */
+- { 2, "octets", ASN1_OCTET_STRING, ASN1_OPT |
+- ASN1_BODY }, /* 4 */
+- { 2, "end choice", ASN1_EOC, ASN1_END }, /* 5 */
+- { 2, "oid", ASN1_OID, ASN1_OPT |
+- ASN1_BODY }, /* 6 */
+- { 2, "end choice", ASN1_EOC, ASN1_END }, /* 7 */
+- { 2, "string", ASN1_UTF8STRING, ASN1_OPT |
+- ASN1_BODY }, /* 8 */
+- { 2, "end choice", ASN1_EOC, ASN1_END }, /* 9 */
+- { 1, "end loop", ASN1_EOC, ASN1_END }, /* 10 */
+- { 0, "exit", ASN1_EOC, ASN1_EXIT }
++ { 0, "ietfAttrSyntax", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */
++ { 1, "policyAuthority", ASN1_CONTEXT_C_0, ASN1_OPT|ASN1_BODY }, /* 1 */
++ { 1, "end opt", ASN1_EOC, ASN1_END }, /* 2 */
++ { 1, "values", ASN1_SEQUENCE, ASN1_LOOP }, /* 3 */
++ { 2, "value choice", ASN1_EOC, ASN1_CHOICE }, /* 4 */
++ { 3, "octets", ASN1_OCTET_STRING, ASN1_OPT|ASN1_BODY }, /* 5 */
++ { 3, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 6 */
++ { 3, "oid", ASN1_OID, ASN1_OPT|ASN1_BODY }, /* 7 */
++ { 3, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 8 */
++ { 3, "string", ASN1_UTF8STRING, ASN1_OPT|ASN1_BODY }, /* 9 */
++ { 3, "end choice", ASN1_EOC, ASN1_END|ASN1_CH }, /* 10 */
++ { 2, "end choices", ASN1_EOC, ASN1_END|ASN1_CHOICE }, /* 11 */
++ { 1, "end loop", ASN1_EOC, ASN1_END }, /* 12 */
++ { 0, "exit", ASN1_EOC, ASN1_EXIT }
+ };
+-#define IETF_ATTR_OCTETS 4
+-#define IETF_ATTR_OID 6
+-#define IETF_ATTR_STRING 8
++#define IETF_ATTR_OCTETS 5
++#define IETF_ATTR_OID 7
++#define IETF_ATTR_STRING 9
+
+ /**
+ * Parse group memberships, IETF attributes
+--
+2.43.0
+
@@ -17,6 +17,7 @@ SRC_URI = "https://download.strongswan.org/strongswan-${PV}.tar.bz2 \
file://CVE-2026-78129.patch \
file://CVE-2026-78130.patch \
file://CVE-2026-78131.patch \
+ file://CVE-2026-78132.patch \
"
SRC_URI[sha256sum] = "07df7cedae56a7f3bb07e66d21a1f9f87e961db70e99184e11d3819413e4f87c"
strongSwan (since 5.1.3, through 6.0.7) allows a denial of service in the x509 plugin related to the parsing of the ietfAttrSyntax ASN.1 type in X.509 attribute certificates. Reference: [https://nvd.nist.gov/vuln/detail/cve-2026-78132] [https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78132).html] [https://security-tracker.debian.org/tracker/CVE-2026-78132] Upstream Patch: [https://download.strongswan.org/security/CVE-2026-78132/] Signed-off-by: Abhishek Bachiphale <Abhishek.Bachiphale@windriver.com> --- .../strongswan/CVE-2026-78132.patch | 77 +++++++++++++++++++ .../strongswan/strongswan_6.0.6.bb | 1 + 2 files changed, 78 insertions(+) create mode 100644 meta-networking/recipes-support/strongswan/strongswan/CVE-2026-78132.patch