Copied from Fedora.

http://pkgs.fedoraproject.org/cgit/unzip.git/plain/unzip-6.0-format-secure.patch?id=d18f821e

diff --git a/extract.c b/extract.c
index eeb2f57..a0a4929 100644
--- a/extract.c
+++ b/extract.c
@@ -472,8 +472,8 @@ int extract_or_test_files(__G)    /* return PK-type error code */
                      */
                     Info(slide, 0x401, ((char *)slide,
                       LoadFarString(CentSigMsg), j + blknum*DIR_BLKSIZ + 1));
-                    Info(slide, 0x401, ((char *)slide,
-                      LoadFarString(ReportMsg)));
+                    Info(slide, 0x401,
+                         ((char *)slide,"%s", LoadFarString(ReportMsg)));
                     error_in_archive = PK_BADERR;
                 }
                 reached_end = TRUE;     /* ...so no more left to do */
@@ -752,8 +752,8 @@ int extract_or_test_files(__G)    /* return PK-type error code */
 
 #ifndef SFX
     if (no_endsig_found) {                      /* just to make sure */
-        Info(slide, 0x401, ((char *)slide, LoadFarString(EndSigMsg)));
-        Info(slide, 0x401, ((char *)slide, LoadFarString(ReportMsg)));
+        Info(slide, 0x401, ((char *)slide,"%s", LoadFarString(EndSigMsg)));
+        Info(slide, 0x401, ((char *)slide,"%s", LoadFarString(ReportMsg)));
         if (!error_in_archive)       /* don't overwrite stronger error */
             error_in_archive = PK_WARN;
     }
diff --git a/list.c b/list.c
index 15e0011..f7359c3 100644
--- a/list.c
+++ b/list.c
@@ -181,7 +181,7 @@ int list_files(__G)    /* return PK-type error code */
                 Info(slide, 0x401,
                      ((char *)slide, LoadFarString(CentSigMsg), j));
                 Info(slide, 0x401,
-                     ((char *)slide, LoadFarString(ReportMsg)));
+                     ((char *)slide,"%s", LoadFarString(ReportMsg)));
                 return PK_BADERR;   /* sig not found */
             }
         }
@@ -507,7 +507,8 @@ int list_files(__G)    /* return PK-type error code */
             && (!G.ecrec.is_zip64_archive)
             && (memcmp(G.sig, end_central_sig, 4) != 0)
            ) {          /* just to make sure again */
-            Info(slide, 0x401, ((char *)slide, LoadFarString(EndSigMsg)));
+            Info(slide, 0x401, 
+                 ((char *)slide,"%s", LoadFarString(EndSigMsg)));
             error_in_archive = PK_WARN;   /* didn't find sig */
         }
 
@@ -591,7 +592,7 @@ int get_time_stamp(__G__ last_modtime, nmember)  /* return PK-type error code */
                 Info(slide, 0x401,
                      ((char *)slide, LoadFarString(CentSigMsg), j));
                 Info(slide, 0x401,
-                     ((char *)slide, LoadFarString(ReportMsg)));
+                     ((char *)slide,"%s", LoadFarString(ReportMsg)));
                 return PK_BADERR;   /* sig not found */
             }
         }
@@ -674,7 +675,7 @@ int get_time_stamp(__G__ last_modtime, nmember)  /* return PK-type error code */
   ---------------------------------------------------------------------------*/
 
     if (memcmp(G.sig, end_central_sig, 4)) {    /* just to make sure again */
-        Info(slide, 0x401, ((char *)slide, LoadFarString(EndSigMsg)));
+        Info(slide, 0x401, ((char *)slide,"%s", LoadFarString(EndSigMsg)));
         error_in_archive = PK_WARN;
     }
     if (*nmember == 0L && error_in_archive <= PK_WARN)
diff --git a/zipinfo.c b/zipinfo.c
index 6e22cc8..ac5c61b 100644
--- a/zipinfo.c
+++ b/zipinfo.c
@@ -771,7 +771,7 @@ int zipinfo(__G)   /* return PK-type error code */
                 Info(slide, 0x401,
                      ((char *)slide, LoadFarString(CentSigMsg), j));
                 Info(slide, 0x401,
-                     ((char *)slide, LoadFarString(ReportMsg)));
+                     ((char *)slide,"%s", LoadFarString(ReportMsg)));
                 error_in_archive = PK_BADERR;   /* sig not found */
                 break;
             }
@@ -960,7 +960,8 @@ int zipinfo(__G)   /* return PK-type error code */
             && (!G.ecrec.is_zip64_archive)
             && (memcmp(G.sig, end_central_sig, 4) != 0)
            ) {          /* just to make sure again */
-            Info(slide, 0x401, ((char *)slide, LoadFarString(EndSigMsg)));
+            Info(slide, 0x401, 
+                 ((char *)slide,"%s", LoadFarString(EndSigMsg)));
             error_in_archive = PK_WARN;   /* didn't find sig */
         }
 
uix/commit/gnu/packages/build-tools.scm?id=137a330988ec89cfe7ec9cb71fa08557c8cc5a55'>gnu: meson: Update to 0.41.1.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-05-07 02:33:29 +0200'>2017-05-07</span></td><td><a href='/guix/commit/gnu/packages/build-tools.scm?id=2d51ed9e04e79c32bb7a50013bc7ab0e55e5a55f'>gnu: meson: Update to 0.40.1.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2017-04-20 18:37:00 +0200'>2017-04-20</span></td><td><a href='/guix/commit/gnu/packages/build-tools.scm?id=162dd2900057ee86b3f69e47223958d99080d547'>gnu: Add Meson.</a><span class='msg-avail'>...</span></td><td>Corentin Bocquillon</td></tr>
<tr><td><span title='2017-04-13 23:17:00 +0200'>2017-04-13</span></td><td><a href='/guix/commit/gnu/packages/build-tools.scm?id=33f79a74b8f97fc39587ca66d38f0d82548bfe28'>gnu: Add bam.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>