gnu: zziplib: Fix CVE-2017-{5974,5975,5976,5978,5979,5981}.

* gnu/packages/patches/zziplib-CVE-2017-5974.patch,
gnu/packages/patches/zziplib-CVE-2017-5975.patch,
gnu/packages/patches/zziplib-CVE-2017-5976.patch,
gnu/packages/patches/zziplib-CVE-2017-5978.patch,
gnu/packages/patches/zziplib-CVE-2017-5979.patch,
gnu/packages/patches/zziplib-CVE-2017-5981.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/zip.scm (zziplib)[source]: Use them.

7 files changed, 202 insertions, 0 deletions

diff --git a/gnu/packages/patches/zziplib-CVE-2017-5974.patch b/gnu/packages/patches/zziplib-CVE-2017-5974.patch
new file mode 100644
index 0000000000..9ae02103e7
--- /dev/null
+++ b/gnu/packages/patches/zziplib-CVE-2017-5974.patch
@@ -0,0 +1,28 @@
+Fix CVE-2017-5974:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5974
+
+Patch copied from Debian.
+
+Index: zziplib-0.13.62/zzip/memdisk.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/memdisk.c
++++ zziplib-0.13.62/zzip/memdisk.c
+@@ -216,12 +216,12 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+         /* override sizes/offsets with zip64 values for largefile support */
+         zzip_extra_zip64 *block = (zzip_extra_zip64 *)
+             zzip_mem_entry_extra_block(item, ZZIP_EXTRA_zip64);
+-        if (block)
++        if (block && ZZIP_GET16(block->z_datasize) >= (8 + 8 + 8 + 4))
+         {
+-            item->zz_usize = __zzip_get64(block->z_usize);
+-            item->zz_csize = __zzip_get64(block->z_csize);
+-            item->zz_offset = __zzip_get64(block->z_offset);
+-            item->zz_diskstart = __zzip_get32(block->z_diskstart);
++            item->zz_usize = ZZIP_GET64(block->z_usize);
++            item->zz_csize = ZZIP_GET64(block->z_csize);
++            item->zz_offset = ZZIP_GET64(block->z_offset);
++            item->zz_diskstart = ZZIP_GET32(block->z_diskstart);
+         }
+     }
+     /* NOTE:
diff --git a/gnu/packages/patches/zziplib-CVE-2017-5975.patch b/gnu/packages/patches/zziplib-CVE-2017-5975.patch
new file mode 100644
index 0000000000..fad174b056
--- /dev/null
+++ b/gnu/packages/patches/zziplib-CVE-2017-5975.patch
@@ -0,0 +1,32 @@
+Fix CVE-2017-5975:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5975
+
+Patch copied from Debian.
+
+Index: zziplib-0.13.62/zzip/memdisk.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/memdisk.c
++++ zziplib-0.13.62/zzip/memdisk.c
+@@ -173,6 +173,8 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+         return 0;               /* errno=ENOMEM; */
+     ___ struct zzip_file_header *header =
+         zzip_disk_entry_to_file_header(disk, entry);
++    if (!header)
++	{ free(item); return 0; }
+     /*  there is a number of duplicated information in the file header
+      *  or the disk entry block. Theoretically some part may be missing
+      *  that exists in the other, ... but we will prefer the disk entry.
+Index: zziplib-0.13.62/zzip/mmapped.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/mmapped.c
++++ zziplib-0.13.62/zzip/mmapped.c
+@@ -289,6 +289,8 @@ zzip_disk_entry_to_file_header(ZZIP_DISK
+         (disk->buffer + zzip_disk_entry_fileoffset(entry));
+     if (disk->buffer > file_header || file_header >= disk->endbuf)
+         return 0;
++    if (ZZIP_GET32(file_header) != ZZIP_FILE_HEADER_MAGIC)
++        return 0;
+     return (struct zzip_file_header *) file_header;
+ }
+ 
diff --git a/gnu/packages/patches/zziplib-CVE-2017-5976.patch b/gnu/packages/patches/zziplib-CVE-2017-5976.patch
new file mode 100644
index 0000000000..17fc30e302
--- /dev/null
+++ b/gnu/packages/patches/zziplib-CVE-2017-5976.patch
@@ -0,0 +1,61 @@
+Fix CVE-2017-5976:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5976
+
+Patch copied from Debian.
+
+Index: zziplib-0.13.62/zzip/memdisk.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/memdisk.c
++++ zziplib-0.13.62/zzip/memdisk.c
+@@ -201,6 +201,7 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+         {
+             void *mem = malloc(ext1 + 2);
+             item->zz_ext[1] = mem;
++	    item->zz_extlen[1] = ext1 + 2;
+             memcpy(mem, ptr1, ext1);
+             ((char *) (mem))[ext1 + 0] = 0;
+             ((char *) (mem))[ext1 + 1] = 0;
+@@ -209,6 +210,7 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+         {
+             void *mem = malloc(ext2 + 2);
+             item->zz_ext[2] = mem;
++	    item->zz_extlen[2] = ext2 + 2;
+             memcpy(mem, ptr2, ext2);
+             ((char *) (mem))[ext2 + 0] = 0;
+             ((char *) (mem))[ext2 + 1] = 0;
+@@ -245,8 +247,10 @@ zzip_mem_entry_extra_block(ZZIP_MEM_ENTR
+     while (1)
+     {
+         ZZIP_EXTRA_BLOCK *ext = entry->zz_ext[i];
+-        if (ext)
++        if (ext && (entry->zz_extlen[i] >= zzip_extra_block_headerlength))
+         {
++	    char *endblock = (char *)ext + entry->zz_extlen[i];
++
+             while (*(short *) (ext->z_datatype))
+             {
+                 if (datatype == zzip_extra_block_get_datatype(ext))
+@@ -257,6 +261,10 @@ zzip_mem_entry_extra_block(ZZIP_MEM_ENTR
+                 e += zzip_extra_block_headerlength;
+                 e += zzip_extra_block_get_datasize(ext);
+                 ext = (void *) e;
++		if (e >= endblock)
++		{
++		    break;
++		}
+                 ____;
+             }
+         }
+Index: zziplib-0.13.62/zzip/memdisk.h
+===================================================================
+--- zziplib-0.13.62.orig/zzip/memdisk.h
++++ zziplib-0.13.62/zzip/memdisk.h
+@@ -66,6 +66,7 @@ struct _zzip_mem_entry {
+     int              zz_filetype;  /* (from "z_filetype") */
+     char*            zz_comment;   /* zero-terminated (from "comment") */
+     ZZIP_EXTRA_BLOCK* zz_ext[3];   /* terminated by null in z_datatype */
++    int              zz_extlen[3]; /* length of zz_ext[i] in bytes */
+ };                                 /* the extra blocks are NOT converted */
+ 
+ #define _zzip_mem_disk_findfirst(_d_) ((_d_)->list)
diff --git a/gnu/packages/patches/zziplib-CVE-2017-5978.patch b/gnu/packages/patches/zziplib-CVE-2017-5978.patch
new file mode 100644
index 0000000000..452b14f804
--- /dev/null
+++ b/gnu/packages/patches/zziplib-CVE-2017-5978.patch
@@ -0,0 +1,37 @@
+Fix CVE-2017-5978:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5978
+
+Patch copied from Debian.
+
+Index: zziplib-0.13.62/zzip/memdisk.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/memdisk.c
++++ zziplib-0.13.62/zzip/memdisk.c
+@@ -180,7 +180,7 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+      *  that exists in the other, ... but we will prefer the disk entry.
+      */
+     item->zz_comment = zzip_disk_entry_strdup_comment(disk, entry);
+-    item->zz_name = zzip_disk_entry_strdup_name(disk, entry);
++    item->zz_name = zzip_disk_entry_strdup_name(disk, entry) ?: strdup("");
+     item->zz_data = zzip_file_header_to_data(header);
+     item->zz_flags = zzip_disk_entry_get_flags(entry);
+     item->zz_compr = zzip_disk_entry_get_compr(entry);
+@@ -197,7 +197,7 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+         int /*            */ ext2 = zzip_file_header_get_extras(header);
+         char *_zzip_restrict ptr2 = zzip_file_header_to_extras(header);
+ 
+-        if (ext1)
++        if (ext1 && ((ptr1 + ext1) < disk->endbuf))
+         {
+             void *mem = malloc(ext1 + 2);
+             item->zz_ext[1] = mem;
+@@ -206,7 +206,7 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZI
+             ((char *) (mem))[ext1 + 0] = 0;
+             ((char *) (mem))[ext1 + 1] = 0;
+         }
+-        if (ext2)
++        if (ext2 && ((ptr2 + ext2) < disk->endbuf))
+         {
+             void *mem = malloc(ext2 + 2);
+             item->zz_ext[2] = mem;
diff --git a/gnu/packages/patches/zziplib-CVE-2017-5979.patch b/gnu/packages/patches/zziplib-CVE-2017-5979.patch
new file mode 100644
index 0000000000..b38f50b172
--- /dev/null
+++ b/gnu/packages/patches/zziplib-CVE-2017-5979.patch
@@ -0,0 +1,19 @@
+Fix CVE-2017-5979:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5979
+
+Patch copied from Debian.
+
+Index: zziplib-0.13.62/zzip/fseeko.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/fseeko.c
++++ zziplib-0.13.62/zzip/fseeko.c
+@@ -255,7 +255,7 @@ zzip_entry_findfirst(FILE * disk)
+         return 0;
+     /* we read out chunks of 8 KiB in the hope to match disk granularity */
+     ___ zzip_off_t pagesize = PAGESIZE; /* getpagesize() */
+-    ___ ZZIP_ENTRY *entry = malloc(sizeof(*entry));
++    ___ ZZIP_ENTRY *entry = calloc(1, sizeof(*entry));
+     if (! entry)
+         return 0;
+     ___ unsigned char *buffer = malloc(pagesize);
diff --git a/gnu/packages/patches/zziplib-CVE-2017-5981.patch b/gnu/packages/patches/zziplib-CVE-2017-5981.patch
new file mode 100644
index 0000000000..ed82cb3b91
--- /dev/null
+++ b/gnu/packages/patches/zziplib-CVE-2017-5981.patch
@@ -0,0 +1,19 @@
+Fix CVE-2017-5981:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5981
+
+Patch copied from Debian.
+Index: zziplib-0.13.62/zzip/fseeko.c
+===================================================================
+--- zziplib-0.13.62.orig/zzip/fseeko.c
++++ zziplib-0.13.62/zzip/fseeko.c
+@@ -311,7 +311,8 @@ zzip_entry_findfirst(FILE * disk)
+             } else
+                 continue;
+ 
+-            assert(0 <= root && root < mapsize);
++	    if (root < 0 || root >= mapsize)
++	        goto error;
+             if (fseeko(disk, root, SEEK_SET) == -1)
+                 goto error;
+             if (fread(disk_(entry), 1, sizeof(*disk_(entry)), disk)
diff --git a/gnu/packages/zip.scm b/gnu/packages/zip.scm
index 8feb4fea21..018891359b 100644
--- a/gnu/packages/zip.scm
+++ b/gnu/packages/zip.scm
@@ -136,6 +136,12 @@ recreates the stored directory structure by default.")
       (uri (string-append "mirror://sourceforge/zziplib/zziplib13/"
                           version "/zziplib-"
                           version ".tar.bz2"))
+      (patches (search-patches "zziplib-CVE-2017-5974.patch"
+                               "zziplib-CVE-2017-5975.patch"
+                               "zziplib-CVE-2017-5976.patch"
+                               "zziplib-CVE-2017-5978.patch"
+                               "zziplib-CVE-2017-5979.patch"
+                               "zziplib-CVE-2017-5981.patch"))
       (sha256
        (base32
         "0nsjqxw017hiyp524p9316283jlf5piixc1091gkimhz38zh7f51"))))