gnu: GnuPG 1.4: Fix CVE-2018-12020.

* gnu/packages/patches/gnupg-1.4-CVE-2018-12020.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/gnupg.scm (gnupg-1)[source]: Use it.

2 files changed, 51 insertions, 0 deletions

diff --git a/gnu/packages/gnupg.scm b/gnu/packages/gnupg.scm
index 7b66ee479d..42b54c1ea0 100644
--- a/gnu/packages/gnupg.scm
+++ b/gnu/packages/gnupg.scm
@@ -354,6 +354,7 @@ libskba (working with X.509 certificates and CMS data).")
               (method url-fetch)
               (uri (string-append "mirror://gnupg/gnupg/gnupg-" version
                                   ".tar.bz2"))
+              (patches (search-patches "gnupg-1.4-CVE-2018-12020.patch"))
               (sha256
                (base32
                 "1d1hz4szh1kvwhsw7w2zxa6q5ndrk3qy6hj289l1b8k3xi5s554m"))))
diff --git a/gnu/packages/patches/gnupg-1.4-CVE-2018-12020.patch b/gnu/packages/patches/gnupg-1.4-CVE-2018-12020.patch
new file mode 100644
index 0000000000..306d4d348b
--- /dev/null
+++ b/gnu/packages/patches/gnupg-1.4-CVE-2018-12020.patch
@@ -0,0 +1,50 @@
+Fix CVE-2018-12020:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12020
+https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000425.html
+
+Patch copied from upstream source repository:
+
+https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=2326851c60793653069494379b16d84e4c10a0ac
+
+From 2326851c60793653069494379b16d84e4c10a0ac Mon Sep 17 00:00:00 2001
+From: Werner Koch <wk@gnupg.org>
+Date: Fri, 8 Jun 2018 10:45:21 +0200
+Subject: [PATCH] gpg: Sanitize diagnostic with the original file name.
+
+* g10/mainproc.c (proc_plaintext): Sanitize verbose output.
+--
+
+This fixes a forgotten sanitation of user supplied data in a verbose
+mode diagnostic.  The mention CVE is about using this to inject
+status-fd lines into the stderr output.  Other harm good as well be
+done.  Note that GPGME based applications are not affected because
+GPGME does not fold status output into stderr.
+
+CVE-id: CVE-2018-12020
+GnuPG-bug-id: 4012
+(cherry picked from commit 13f135c7a252cc46cff96e75968d92b6dc8dce1b)
+---
+ g10/mainproc.c | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+diff --git a/g10/mainproc.c b/g10/mainproc.c
+index 33a654b34..ffa7ef6d8 100644
+--- a/g10/mainproc.c
++++ b/g10/mainproc.c
+@@ -638,7 +638,11 @@ proc_plaintext( CTX c, PACKET *pkt )
+     if( pt->namelen == 8 && !memcmp( pt->name, "_CONSOLE", 8 ) )
+ 	log_info(_("NOTE: sender requested \"for-your-eyes-only\"\n"));
+     else if( opt.verbose )
+-	log_info(_("original file name='%.*s'\n"), pt->namelen, pt->name);
++      {
++        char *tmp = make_printable_string (pt->name, pt->namelen, 0);
++        log_info (_("original file name='%.*s'\n"), (int)strlen (tmp), tmp);
++        xfree (tmp);
++      }
+     free_md_filter_context( &c->mfx );
+     c->mfx.md = md_open( 0, 0);
+     /* fixme: we may need to push the textfilter if we have sigclass 1
+-- 
+2.17.1
+