File CVE-2015-7697.patch of Package unzip

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File CVE-2015-7697.patch of Package unzip

From: Kamil Dudka <kdudka@redhat.com>
Date: Mon, 14 Sep 2015 18:24:56 +0200
Subject: fix infinite loop when extracting empty bzip2 data
Bug-Debian: https://bugs.debian.org/802160
Bug-RedHat: https://bugzilla.redhat.com/show_bug.cgi?id=1260944
Origin: other, https://bugzilla.redhat.com/attachment.cgi?id=1073339

---
 extract.c | 6 ++++++
 1 file changed, 6 insertions(+)

Index: unzip60/extract.c
===================================================================
--- unzip60.orig/extract.c
+++ unzip60/extract.c
@@ -2721,6 +2721,12 @@ __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;
Index: unzip60/zipinfo.c
===================================================================
--- unzip60.orig/zipinfo.c
+++ unzip60/zipinfo.c
@@ -1888,7 +1888,7 @@ static int zi_short(__G)   /* return PK-
     int         k, error, error_in_archive=PK_COOL;
     unsigned    hostnum, hostver, methid, methnum, xattr;
     char        *p, workspace[12], attribs[16];
-    char        methbuf[5];
+    char        methbuf[1+5+1];	/* large enough to hold 1 character + an unsigned short + NUL */
     static ZCONST char dtype[5]="NXFS"; /* normal, maximum, fast, superfast */
     static ZCONST char Far os[NUM_HOSTS+1][4] = {
         "fat", "ami", "vms", "unx", "cms", "atr", "hpf", "mac", "zzz",

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