gnupg: CVE-2018-9234

* CVE-2018-9234
GnuPG 2.2.4 and 2.2.5 does not enforce a configuration in which key
certification requires an offline master Certify key, which results
in apparently valid certifications that occurred only with access to
a signing subkey.

Affects gnupg <= 2.2.5

CVE: CVE-2018-9234
Ref: https://access.redhat.com/security/cve/cve-2018-9234
(From OE-Core rev: af920831ed1ef607db195372f135cc56e9f53b41)

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/gnupg/gnupg/CVE-2018-9234.patch

@@ -0,0 +1,28 @@
+From ce055269c80f6e7c1393c0deec7bc5f0d37895ea Mon Sep 17 00:00:00 2001
+From: Sinan Kaya <okaya@kernel.org>
+Date: Sun, 23 Sep 2018 04:05:47 +0000
+Subject: [PATCH] g10: Fix filtering by PK->REQ_USAGE
+
+Upstream-Status: Backport [https://dev.gnupg.org/rGa17d2d1f690ebe5d005b4589a5fe378b6487c657]
+CVE: CVE-2018-9234
+Signed-off-by: Sinan Kaya <okaya@kernel.org>
+---
+ g10/getkey.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/g10/getkey.c b/g10/getkey.c
+index e31e023..ca2500c 100644
+--- a/g10/getkey.c
++++ b/g10/getkey.c
+@@ -1810,6 +1810,8 @@ get_pubkey_byfprint (ctrl_t ctrl, PKT_public_key *pk, kbnode_t *r_keyblock,
+       ctx.items[0].mode = fprint_len == 16 ? KEYDB_SEARCH_MODE_FPR16
+ 	: KEYDB_SEARCH_MODE_FPR20;
+       memcpy (ctx.items[0].u.fpr, fprint, fprint_len);
++      if (pk)
++        ctx.req_usage = pk->req_usage;
+       rc = lookup (ctrl, &ctx, 0, &kb, &found_key);
+       if (!rc && pk)
+ 	pk_from_block (pk, kb, found_key);
+-- 
+2.19.0
+

meta/recipes-support/gnupg/gnupg_2.2.4.bb

@@ -15,6 +15,7 @@ SRC_URI = "${GNUPG_MIRROR}/${BPN}/${BPN}-${PV}.tar.bz2 \
            file://0003-dirmngr-uses-libgpg-error.patch \
            file://0004-autogen.sh-fix-find-version-for-beta-checking.patch \
            file://CVE-2018-12020.patch \
+           file://CVE-2018-9234.patch \
           "
 SRC_URI_append_class-native = " file://0001-configure.ac-use-a-custom-value-for-the-location-of-.patch"