The fix is taken from http://www.info-zip.org/phpBB3/viewtopic.php?f=7&t=454
and should be available in next unzip release.

--- unzip60/extract.c	Fri Feb 26 07:14:44 2016
+++ /home/vmarek/extract.c	Mon Feb 22 08:32:56 2016
@@ -298,7 +298,7 @@
 #ifndef SFX
    static ZCONST char Far InconsistEFlength[] = "bad extra-field entry:\n \
      EF block length (%u bytes) exceeds remaining EF data (%u bytes)\n";
-   static ZCONST char Far TooSmallEFlength[] = "bad extra-field entry:\n \
+   static ZCONST char Far TooSmallEBlength[] = "bad extra-field entry:\n \
      EF block length (%u bytes) invalid (< %d)\n";
    static ZCONST char Far InvalidComprDataEAs[] =
      " invalid compressed data for EAs\n";
@@ -2035,16 +2035,6 @@
               ebLen, (ef_len - EB_HEADSIZE)));
             return PK_ERR;
         }
-        else if (ebLen < EB_HEADSIZE)
-        {
-            /* Extra block length smaller than header length. */
-            if (uO.qflag)
-                Info(slide, 1, ((char *)slide, "%-22s ",
-                  FnFilter1(G.filename)));
-            Info(slide, 1, ((char *)slide, LoadFarString(TooSmallEFlength),
-              ebLen, EB_HEADSIZE));
-            return PK_ERR;
-        }
 
         switch (ebID) {
             case EF_OS2:
@@ -2171,11 +2161,19 @@
                 }
                 break;
             case EF_PKVMS:
-                if (makelong(ef+EB_HEADSIZE) !=
+                if (ebLen < 4)
+                {
+                    Info(slide, 1,
+                     ((char *)slide, LoadFarString(TooSmallEBlength),
+                     ebLen, 4));
+                }
+                else if (makelong(ef+EB_HEADSIZE) !=
                     crc32(CRCVAL_INITIAL, ef+(EB_HEADSIZE+4),
                           (extent)(ebLen-4)))
+                {
                     Info(slide, 1, ((char *)slide,
                       LoadFarString(BadCRC_EAs)));
+                }
                 break;
             case EF_PKW32:
             case EF_PKUNIX:
@@ -2230,7 +2228,7 @@
     ulg eb_ucsize;
     uch *eb_ucptr;
     int r;
-    ush method;
+    ush eb_compr_method;
 
     if (compr_offset < 4)                /* field is not compressed: */
         return PK_OK;                    /* do nothing and signal OK */
@@ -2247,11 +2245,14 @@
      ((eb_ucsize > 0L) && (eb_size <= (compr_offset + EB_CMPRHEADLEN))))
         return IZ_EF_TRUNC;             /* no/bad compressed data! */
 
-    method = makeword(eb + (EB_HEADSIZE + compr_offset));
-    if ((method == STORED) && (eb_size - compr_offset != eb_ucsize))
-	return PK_ERR;			  /* compressed & uncompressed
-					   * should match in STORED
-					   * method */
+    /* 2015-02-10 Mancha(?), Michal Zalewski, Tomas Hoger, SMS.
+     * For STORE method, compressed and uncompressed sizes must agree.
+     * http://www.info-zip.org/phpBB3/viewtopic.php?f=7&t=450
+     */
+    eb_compr_method = makeword( eb + (EB_HEADSIZE + compr_offset));
+    if ((eb_compr_method == STORED) &&
+     (eb_size != compr_offset + EB_CMPRHEADLEN + eb_ucsize))
+        return PK_ERR;
 
     if (
 #ifdef INT_16BIT
@@ -2523,10 +2524,28 @@
     __GDEF
     slinkentry *slnk_entry;
 {
+    int sts;
     extent ucsize = slnk_entry->targetlen;
     char *linkfname = slnk_entry->fname;
     char *linktarget = (char *)malloc(ucsize+1);
 
+#ifdef VMS
+    static int vms_symlink_works = -1;
+
+    if (vms_symlink_works < 0)
+    {
+        /* Test symlink() with an invalid file name.  If errno comes
+         * back ENOSYS ("Function not implemented"), then don't try to
+         * use it below on the symlink placeholder text files.
+         */
+        vms_symlink_works = symlink( "", "?");
+        if (errno == ENOSYS)
+            vms_symlink_works = 0;
+        else
+            vms_symlink_works = 1;
+    }
+#endif /* def VMS */
+
     if (!linktarget) {
         Info(slide, 0x201, ((char *)slide,
           LoadFarString(SymLnkWarnNoMem), FnFilter1(linkfname)));
@@ -2554,11 +2573,29 @@
         return;
     }
     fclose(G.outfile);                  /* close "data" file for good... */
+
+#ifdef VMS
+    if (vms_symlink_works == 0)
+    {
+        /* Should we be using some UnZip error message function instead
+         * of perror() (or equivalent) for these "symlink error"
+         * messages?
+         */
+        Info(slide, 0, ((char *)slide, LoadFarString(SymLnkFinish),
+          FnFilter1(linkfname), FnFilter2(linktarget)));
+
+        fprintf( stderr, "Symlink error: %s\n", strerror( ENOSYS));
+        free(linktarget);
+        return;
+    }
+#endif /* def VMS */
+
     unlink(linkfname);                  /* ...and delete it */
-    if (QCOND2)
+    sts = symlink(linktarget, linkfname);       /* create the real link */
+    if (QCOND2 || (sts != 0))
         Info(slide, 0, ((char *)slide, LoadFarString(SymLnkFinish),
           FnFilter1(linkfname), FnFilter2(linktarget)));
-    if (symlink(linktarget, linkfname))  /* create the real link */
+    if (sts != 0)
         perror("symlink error");
     free(linktarget);
 #ifdef SET_SYMLINK_ATTRIBS
@@ -2652,7 +2689,7 @@
 #endif /* ?HAVE_WORKING_ISPRINT */
         } else {
 #ifdef _MBCS
-            unsigned i = CLEN(r);
+            extent i = CLEN(r);
             if (se != NULL && (s > (space + (size-i-2)))) {
                 have_overflow = TRUE;
                 break;
@@ -2835,7 +2872,7 @@
 #endif
 
     G.inptr = (uch *)bstrm.next_in;
-    G.incnt = (G.inbuf + INBUFSIZ) - G.inptr;  /* reset for other routines */
+    G.incnt = (int)((G.inbuf + INBUFSIZ) - G.inptr);  /* Reset for others. */
 
 uzbunzip_cleanup_exit:
     err = BZ2_bzDecompressEnd(&bstrm);