From cfaa28168a07ea4a53276b63068f94fce37d6aff Mon Sep 17 00:00:00 2001 From: Tim Kientzle Date: Thu, 24 Mar 2022 10:35:00 +0100 Subject: [PATCH] ZIP reader: fix possible out-of-bounds read in zipx_lzma_alone_init() Fixes #1672 --- libarchive/archive_read_support_format_zip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libarchive/archive_read_support_format_zip.c b/libarchive/archive_read_support_format_zip.c index 38ada70b5..9d6c900b2 100644 --- a/libarchive/archive_read_support_format_zip.c +++ b/libarchive/archive_read_support_format_zip.c @@ -1667,7 +1667,7 @@ zipx_lzma_alone_init(struct archive_read *a, struct zip *zip) */ /* Read magic1,magic2,lzma_params from the ZIPX stream. */ - if((p = __archive_read_ahead(a, 9, NULL)) == NULL) { + if(zip->entry_bytes_remaining < 9 || (p = __archive_read_ahead(a, 9, NULL)) == NULL) { archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Truncated lzma data"); return (ARCHIVE_FATAL);