[bug#29383] [PATCH] gnu: procmail: Fix CVE-2017-16844.

[Leo Famulari <leo@famulari.name>]

* gnu/packages/patches/procmail-CVE-2017-16844.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/mail.scm (procmail)[source]: Use it.
---
 gnu/local.mk                                       |  1 +
 gnu/packages/mail.scm                              |  3 ++-
 gnu/packages/patches/procmail-CVE-2017-16844.patch | 25 ++++++++++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/procmail-CVE-2017-16844.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index f8e553965..0993c4587 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -978,6 +978,7 @@ dist_patch_DATA =						\
   %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/procmail-CVE-2017-16844.patch		\
   %D%/packages/patches/proot-test-fhs.patch			\
   %D%/packages/patches/psm-arch.patch				\
   %D%/packages/patches/psm-ldflags.patch			\
diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 77d935171..38140d6e6 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -1611,7 +1611,8 @@ deliver it in various ways.")
        ;; getline() in formail.c.  The patch is provided by Debian as
        ;; patch 24.
        (patches (search-patches "procmail-ambiguous-getline-debian.patch"
-                                "procmail-CVE-2014-3618.patch"))))
+                                "procmail-CVE-2014-3618.patch"
+                                "procmail-CVE-2017-16844.patch"))))
     (arguments
      `(#:phases (modify-phases %standard-phases
                   (replace 'configure
diff --git a/gnu/packages/patches/procmail-CVE-2017-16844.patch b/gnu/packages/patches/procmail-CVE-2017-16844.patch
new file mode 100644
index 000000000..b96540c8c
--- /dev/null
+++ b/gnu/packages/patches/procmail-CVE-2017-16844.patch
@@ -0,0 +1,25 @@
+Fix CVE-2017-16844:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16844
+https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=876511
+
+Patch copied from Debian procmail package 3.22-26:
+
+http://http.debian.net/debian/pool/main/p/procmail/procmail_3.22-26.debian.tar.xz
+
+From: Santiago Vila <sanvila@debian.org>
+Subject: Fix heap-based buffer overflow in loadbuf()
+Bug-Debian: http://bugs.debian.org/876511
+X-Debian-version: 3.22-26
+
+--- a/src/formisc.c
++++ b/src/formisc.c
+@@ -103,7 +103,7 @@
+ }
+ 							    /* append to buf */
+ void loadbuf(text,len)const char*const text;const size_t len;
+-{ if(buffilled+len>buflen)			  /* buf can't hold the text */
++{ while(buffilled+len>buflen)			  /* buf can't hold the text */
+      buf=realloc(buf,buflen+=Bsize);
+   tmemmove(buf+buffilled,text,len);buffilled+=len;
+ }
-- 
2.15.0