39 строки
1.5 KiB
Diff
39 строки
1.5 KiB
Diff
From 431e66398552effd82d5c0ea982a521821782ebd Mon Sep 17 00:00:00 2001
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From: Hans Wennborg <hans@chromium.org>
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Date: Fri, 18 Aug 2023 11:05:33 +0200
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Subject: [PATCH] minizip: Check length of comment, filename, and extra field,
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in zipOpenNewFileInZip4_64
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These are stored in 16-bit fields in the zip file format. Passing longer
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values would generate an invalid file.
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Passing very long values could also cause the computation of
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zi->ci.size_centralheader to overflow, which would cause heap buffer
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overflow on subsequent writes to zi->ci.central_header.
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---
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contrib/minizip/zip.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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diff --git a/contrib/minizip/zip.c b/contrib/minizip/zip.c
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index 3d3d4cadd..0446109b2 100644
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--- a/compat/zlib/contrib/minizip/zip.c
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+++ b/compat/zlib/contrib/minizip/zip.c
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@@ -1043,6 +1043,17 @@ extern int ZEXPORT zipOpenNewFileInZip4_64(zipFile file, const char* filename, c
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return ZIP_PARAMERROR;
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#endif
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+ // The filename and comment length must fit in 16 bits.
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+ if ((filename!=NULL) && (strlen(filename)>0xffff))
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+ return ZIP_PARAMERROR;
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+ if ((comment!=NULL) && (strlen(comment)>0xffff))
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+ return ZIP_PARAMERROR;
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+ // The extra field length must fit in 16 bits. If the member also requires
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+ // a Zip64 extra block, that will also need to fit within that 16-bit
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+ // length, but that will be checked for later.
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+ if ((size_extrafield_local>0xffff) || (size_extrafield_global>0xffff))
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+ return ZIP_PARAMERROR;
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+
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zi = (zip64_internal*)file;
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if (zi->in_opened_file_inzip == 1)
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