From 2c8c83b9731ff822fad6cc8c670ea5519c366a14 Mon Sep 17 00:00:00 2001

From: Joerg Sonnenberger <joerg@bec.de>

Date: Thu, 19 Jul 2018 21:14:53 +0200

Subject: [PATCH] Reject LHA archive entries with negative size.

---

 libarchive/archive_read_support_format_lha.c | 6 ++++++

 1 file changed, 6 insertions(+)

diff --git a/libarchive/archive_read_support_format_lha.c b/libarchive/archive_read_support_format_lha.c

index b8ef4ae1..95c99bb1 100644

--- a/libarchive/archive_read_support_format_lha.c

+++ b/libarchive/archive_read_support_format_lha.c

@@ -701,6 +701,12 @@ archive_read_format_lha_read_header(struct archive_read *a,

 	 * Prepare variables used to read a file content.

 	 */

 	lha->entry_bytes_remaining = lha->compsize;

+	if (lha->entry_bytes_remaining < 0) {

+		archive_set_error(&a->archive,

+		    ARCHIVE_ERRNO_FILE_FORMAT,

+		    "Invalid LHa entry size");

+		return (ARCHIVE_FATAL);

+	}

 	lha->entry_offset = 0;

 	lha->entry_crc_calculated = 0;

-- 

2.20.1