gnu: procmail: Fix CVE-2014-3618.

* gnu/packages/patches/procmail-CVE-2014-3618.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/mail.scm (procmail): Use it.

gnu/local.mk

@@ -689,6 +689,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/portaudio-audacity-compat.patch		\
   %D%/packages/patches/portmidi-modular-build.patch		\
   %D%/packages/patches/procmail-ambiguous-getline-debian.patch  \
+  %D%/packages/patches/procmail-CVE-2014-3618.patch		\
   %D%/packages/patches/pt-scotch-build-parallelism.patch	\
   %D%/packages/patches/pulseaudio-fix-mult-test.patch		\
   %D%/packages/patches/pulseaudio-longer-test-timeout.patch	\

gnu/packages/mail.scm

@@ -1149,7 +1149,8 @@ deliver it in various ways.")
        ;; The following patch fixes an ambiguous definition of
        ;; getline() in formail.c.  The patch is provided by Debian as
        ;; patch 24.
-       (patches (search-patches "procmail-ambiguous-getline-debian.patch"))))
+       (patches (search-patches "procmail-ambiguous-getline-debian.patch"
+                                "procmail-CVE-2014-3618.patch"))))
     (arguments
      `(#:phases (modify-phases %standard-phases
                   (replace 'configure

gnu/packages/patches/procmail-CVE-2014-3618.patch

@@ -0,0 +1,26 @@
+Fixes CVE-2014-3618 (heap overflow in formisc.c allowing denial of
+service and potential remote execution of arbitrary code).
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3618
+
+Source:
+http://seclists.org/oss-sec/2014/q3/495
+
+Adopted by Debian as patch '27':
+https://sources.debian.net/src/procmail/3.22-25/debian/patches/27/
+
+--- a/src/formisc.c
++++ b/src/formisc.c
+@@ -84,12 +84,11 @@
+ 	case '"':*target++=delim='"';start++;
+       }
+      ;{ int i;
+-	do
++	while(*start)
+ 	   if((i= *target++= *start++)==delim)	 /* corresponding delimiter? */
+ 	      break;
+ 	   else if(i=='\\'&&*start)		    /* skip quoted character */
+ 	      *target++= *start++;
+-	while(*start);						/* anything? */
+       }
+      hitspc=2;
+    }