system/unzip: change upstream to Debian (#123)

Debian's patches close several CVEs, including a few of which I wasn't
even aware. They also include the patches we were already carrying:

These were plucked directly from Debian so the names are the same:
10-unzip-handle-pkware-verify.patch
20-unzip-uidgid-fix.patch

Our unzip-6.0-heap-overflow-infloop.patch is covered by Debian's:
14-cve-2015-7696.patch
15-cve-2015-7697.patch
16-fix-integer-underflow-csiz-decrypted.patch

1 files changed, 0 insertions, 104 deletions

diff --git a/system/unzip/unzip-6.0-heap-overflow-infloop.patch b/system/unzip/unzip-6.0-heap-overflow-infloop.patch
deleted file mode 100644
index 160c512f9..000000000
--- a/system/unzip/unzip-6.0-heap-overflow-infloop.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-From bdd4a0cecd745cb4825e4508b5bdf2579731086a Mon Sep 17 00:00:00 2001
-From: Petr Stodulka <pstodulk@redhat.com>
-Date: Mon, 14 Sep 2015 18:23:17 +0200
-Subject: [PATCH 1/3] upstream fix for heap overflow
-
-https://bugzilla.redhat.com/attachment.cgi?id=1073002
----
- crypt.c | 12 +++++++++++-
- 1 file changed, 11 insertions(+), 1 deletion(-)
-
-diff --git a/crypt.c b/crypt.c
-index 784e411..a8975f2 100644
---- a/crypt.c
-+++ b/crypt.c
-@@ -465,7 +465,17 @@ int decrypt(__G__ passwrd)
-     GLOBAL(pInfo->encrypted) = FALSE;
-     defer_leftover_input(__G);
-     for (n = 0; n < RAND_HEAD_LEN; n++) {
--        b = NEXTBYTE;
-+        /* 2012-11-23 SMS.  (OUSPG report.)
-+         * Quit early if compressed size < HEAD_LEN.  The resulting
-+         * error message ("unable to get password") could be improved,
-+         * but it's better than trying to read nonexistent data, and
-+         * then continuing with a negative G.csize.  (See
-+         * fileio.c:readbyte()).
-+         */
-+        if ((b = NEXTBYTE) == (ush)EOF)
-+        {
-+            return PK_ERR;
-+        }
-         h[n] = (uch)b;
-         Trace((stdout, " (%02x)", h[n]));
-     }
--- 
-2.4.6
-
-
-From 4b48844661ff9569f2ecf582a387d46a5775b5d8 Mon Sep 17 00:00:00 2001
-From: Kamil Dudka <kdudka@redhat.com>
-Date: Mon, 14 Sep 2015 18:24:56 +0200
-Subject: [PATCH 2/3] fix infinite loop when extracting empty bzip2 data
-
-Bug: https://sourceforge.net/p/infozip/patches/23/
----
- extract.c | 6 ++++++
- 1 file changed, 6 insertions(+)
-
-diff --git a/extract.c b/extract.c
-index 7134bfe..29db027 100644
---- a/extract.c
-+++ b/extract.c
-@@ -2733,6 +2733,12 @@ __GDEF
-     int repeated_buf_err;
-     bz_stream bstrm;
- 
-+    if (G.incnt <= 0 && G.csize <= 0L) {
-+        /* avoid an infinite loop */
-+        Trace((stderr, "UZbunzip2() got empty input\n"));
-+        return 2;
-+    }
-+
- #if (defined(DLL) && !defined(NO_SLIDE_REDIR))
-     if (G.redirect_slide)
-         wsize = G.redirect_size, redirSlide = G.redirect_buffer;
--- 
-2.4.6
-
-
-From bd150334fb4084f5555a6be26b015a0671cb5b74 Mon Sep 17 00:00:00 2001
-From: Kamil Dudka <kdudka@redhat.com>
-Date: Tue, 22 Sep 2015 18:52:23 +0200
-Subject: [PATCH 3/3] extract: prevent unsigned overflow on invalid input
-
-Suggested-by: Stefan Cornelius
----
- extract.c | 11 ++++++++++-
- 1 file changed, 10 insertions(+), 1 deletion(-)
-
-diff --git a/extract.c b/extract.c
-index 29db027..b9ae667 100644
---- a/extract.c
-+++ b/extract.c
-@@ -1257,8 +1257,17 @@ static int extract_or_test_entrylist(__G__ numchunk,
-         if (G.lrec.compression_method == STORED) {
-             zusz_t csiz_decrypted = G.lrec.csize;
- 
--            if (G.pInfo->encrypted)
-+            if (G.pInfo->encrypted) {
-+                if (csiz_decrypted <= 12) {
-+                    /* handle the error now to prevent unsigned overflow */
-+                    Info(slide, 0x401, ((char *)slide,
-+                      LoadFarStringSmall(ErrUnzipNoFile),
-+                      LoadFarString(InvalidComprData),
-+                      LoadFarStringSmall2(Inflate)));
-+                    return PK_ERR;
-+                }
-                 csiz_decrypted -= 12;
-+            }
-             if (G.lrec.ucsize != csiz_decrypted) {
-                 Info(slide, 0x401, ((char *)slide,
-                   LoadFarStringSmall2(WrnStorUCSizCSizDiff),
--- 
-2.5.2
-