gpgme: fix CVE-2014-3564

Backport patch to fix CVE-2014-3564.

http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=commit;h=2cbd76f

(From OE-Core rev: 421e21b08a6a32db88aaf46033ca503a99e49b74)

(From OE-Core rev: 204f24855a00f595ddfa040ae149b4184721603f)

Signed-off-by: Kai Kang <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Joshua Lock <joshua.lock@collabora.co.uk>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 59 insertions, 1 deletions

diff --git a/meta/recipes-support/gpgme/gpgme-1.4.3/gpgme-fix-CVE-2014-3564.patch b/meta/recipes-support/gpgme/gpgme-1.4.3/gpgme-fix-CVE-2014-3564.patch
new file mode 100644
index 0000000000..c728f58658
--- /dev/null
+++ b/meta/recipes-support/gpgme/gpgme-1.4.3/gpgme-fix-CVE-2014-3564.patch
@@ -0,0 +1,56 @@
+Upstream-Status: Backport
+
+Backport patch to fix CVE-2014-3564.
+
+http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=commit;h=2cbd76f7911fc215845e89b50d6af5ff4a83dd77
+
+Signed-off-by: Kai Kang <kai.kang@windriver.com>
+---
+From 2cbd76f7911fc215845e89b50d6af5ff4a83dd77 Mon Sep 17 00:00:00 2001
+From: Werner Koch <wk@gnupg.org>
+Date: Wed, 30 Jul 2014 11:04:55 +0200
+Subject: [PATCH 1/1] Fix possible realloc overflow for gpgsm and uiserver
+ engines.
+
+After a realloc (realloc is also used for initial alloc) the allocated
+size if the buffer is not correctly recorded.  Thus an overflow can be
+introduced by receiving data with different line lengths in a specific
+order.  This is not easy exploitable because libassuan constructs the
+line.  However a crash has been reported and thus it might be possible
+to constructs an exploit.
+
+CVE-id: CVE-2014-3564
+Reported-by: Tomáš Trnka
+---
+ src/engine-gpgsm.c    | 2 +-
+ src/engine-uiserver.c | 2 +-
+ 3 files changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/src/engine-gpgsm.c b/src/engine-gpgsm.c
+index 8ec1598..3a83757 100644
+--- a/src/engine-gpgsm.c
++++ b/src/engine-gpgsm.c
+@@ -836,7 +836,7 @@ status_handler (void *opaque, int fd)
+              else
+                {
+                  *aline = newline;
+-                 gpgsm->colon.attic.linesize += linelen + 1;
++                 gpgsm->colon.attic.linesize = *alinelen + linelen + 1;
+                }
+            }
+          if (!err)
+diff --git a/src/engine-uiserver.c b/src/engine-uiserver.c
+index 2738c36..a7184b7 100644
+--- a/src/engine-uiserver.c
++++ b/src/engine-uiserver.c
+@@ -698,7 +698,7 @@ status_handler (void *opaque, int fd)
+              else
+                {
+                  *aline = newline;
+-                 uiserver->colon.attic.linesize += linelen + 1;
++                 uiserver->colon.attic.linesize = *alinelen + linelen + 1;
+                }
+            }
+          if (!err)
+-- 
+2.1.4
diff --git a/meta/recipes-support/gpgme/gpgme_1.4.3.bb b/meta/recipes-support/gpgme/gpgme_1.4.3.bb
index 98fd68b837..61213efcbf 100644
--- a/meta/recipes-support/gpgme/gpgme_1.4.3.bb
+++ b/meta/recipes-support/gpgme/gpgme_1.4.3.bb
@@ -10,7 +10,9 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=94d55d512a9ba36caa9b7df079bae19f \
                     file://src/engine.h;endline=22;md5=4b6d8ba313d9b564cc4d4cfb1640af9d"
 
 SRC_URI = "ftp://ftp.gnupg.org/gcrypt/gpgme/gpgme-${PV}.tar.bz2 \
-           file://gpgme.pc"
+           file://gpgme.pc \
+           file://gpgme-fix-CVE-2014-3564.patch \
+          "
 
 SRC_URI[md5sum] = "334e524cffa8af4e2f43ae8afe585672"
 SRC_URI[sha256sum] = "2d1cc12411753752d9c5b9037e6fd3fd363517af720154768cc7b46b60120496"