29 lines
1018 B
Diff
29 lines
1018 B
Diff
From a803559fa9194be895422ba3684cf6309b6bb598 Mon Sep 17 00:00:00 2001
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From: Guido Draheim <guidod@gmx.de>
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Date: Thu, 1 Feb 2018 12:27:49 +0100
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Subject: [PATCH] merge CVE-2018-6381.patch from @jmoellers #12
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---
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zzip/memdisk.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/zzip/memdisk.c b/zzip/memdisk.c
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index cab883b..a85dab0 100644
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--- a/zzip/memdisk.c
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+++ b/zzip/memdisk.c
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@@ -210,6 +210,14 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZIP_DISK_ENTRY * entry)
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item->zz_diskstart = zzip_disk_entry_get_diskstart(entry);
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item->zz_filetype = zzip_disk_entry_get_filetype(entry);
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+ /*
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+ * If the file is uncompressed, zz_csize and zz_usize should be the same
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+ * If they are not, we cannot guarantee that either is correct, so ...
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+ */
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+ if (item->zz_compr == ZZIP_IS_STORED && item->zz_csize != item->zz_usize)
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+ {
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+ goto error;
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+ }
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/* zz_comment and zz_name are empty strings if not present on disk */
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if (! item->zz_comment || ! item->zz_name)
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{
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