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| | Description: Fix CVE-2013-0211: read buffer overflow on 64-bit systems
Origin: upstream
Bug-Debian: http://bugs.debian.org/703957
Forwarded: not-needed
--- libarchive-3.0.4.orig/libarchive/archive_write.c
+++ libarchive-3.0.4/libarchive/archive_write.c
@@ -665,8 +665,13 @@ static ssize_t
_archive_write_data(struct archive *_a, const void *buff, size_t s)
{
struct archive_write *a = (struct archive_write *)_a;
+ const size_t max_write = INT_MAX;
+
archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC,
ARCHIVE_STATE_DATA, "archive_write_data");
+ /* In particular, this catches attempts to pass negative values. */
+ if (s > max_write)
+ s = max_write;
archive_clear_error(&a->archive);
return ((a->format_write_data)(a, buff, s));
}
|