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 */
         }
 
/td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-26 17:54:58 +0100'>2022-01-26</span></td><td><a href='/guix/commit/tests/pypi.scm?id=bac9f8302c65802a576f733cc48829edb33019d8'>import: pypi: Convert hyphens to underscores in PyPI URLs if needed.</a><span class='msg-avail'>...</span></td><td>Vivien Kraus</td></tr>
<tr><td><span title='2021-11-18 22:56:10 +0100'>2021-11-18</span></td><td><a href='/guix/commit/tests/pypi.scm?id=bcff9d6388dc1cad38fbfb3983f97f52d0533301'>tests: Adjust opam and pypi tests to simplified inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-11-17 23:43:14 +0100'>2021-11-17</span></td><td><a href='/guix/commit/tests/pypi.scm?id=3a317f7476f8c6012e166ff9f340f861938721c9'>Merge branch 'master' into core-updates-frozen</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-11-11 00:14:30 +0100'>2021-11-11</span></td><td><a href='/guix/commit/tests/pypi.scm?id=b20cd80ff1f3c9eb988a0cc27ed9538b68914608'>import: pypi: Allow imports of a specific version.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-12 17:46:23 +0000'>2021-10-12</span></td><td><a href='/guix/commit/tests/pypi.scm?id=a1eca979fb8da842e73c42f4f53be29b169810f2'>Merge remote-tracking branch 'origin/master' into core-updates-frozen.</a></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2021-09-30 23:44:49 +0200'>2021-09-30</span></td><td><a href='/guix/commit/tests/pypi.scm?id=7b75f90c5b0da896c486cae23d19d43e2a03bb56'>import: pypi: Honor the 'upstream-name' package property.</a><span class='msg-avail'>...</span></td><td>Xinglu Chen</td></tr>
<tr><td><span title='2021-07-11 00:49:15 +0200'>2021-07-11</span></td><td><a href='/guix/commit/tests/pypi.scm?id=52a9a0712abb2a2b02e5747d118fecff95d92366'>import: pypi: Emit new-style package inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>