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Fix CVE-2017-14502:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14502
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=573
Patch copied from upstream source repository:
https://github.com/libarchive/libarchive/commit/5562545b5562f6d12a4ef991fae158bf4ccf92b6
From 5562545b5562f6d12a4ef991fae158bf4ccf92b6 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger <joerg@bec.de>
Date: Sat, 9 Sep 2017 17:47:32 +0200
Subject: [PATCH] Avoid a read off-by-one error for UTF16 names in RAR
archives.
Reported-By: OSS-Fuzz issue 573
---
libarchive/archive_read_support_format_rar.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libarchive/archive_read_support_format_rar.c b/libarchive/archive_read_support_format_rar.c
index cbb14c32..751de697 100644
--- a/libarchive/archive_read_support_format_rar.c
+++ b/libarchive/archive_read_support_format_rar.c
@@ -1496,7 +1496,11 @@ read_header(struct archive_read *a, struct archive_entry *entry,
return (ARCHIVE_FATAL);
}
filename[filename_size++] = '\0';
- filename[filename_size++] = '\0';
+ /*
+ * Do not increment filename_size here as the computations below
+ * add the space for the terminating NUL explicitly.
+ */
+ filename[filename_size] = '\0';
/* Decoded unicode form is UTF-16BE, so we have to update a string
* conversion object for it. */
--
2.15.1
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