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| author | Tim Kientzle <kientzle@acm.org> | 2016-05-14 12:37:37 -0700 |
|---|---|---|
| committer | Tim Kientzle <kientzle@acm.org> | 2016-05-14 12:37:37 -0700 |
| commit | fd7e0c02e272913a0a8b6d492c7260dfca0b1408 (patch) | |
| tree | 9b3ffce56a0a62a3dc3ce727a04414d7eb7a321d /libarchive/archive_read_support_format_cpio.c | |
| parent | f48d99b56c525c3035de63a36e3321701b58b3c1 (diff) | |
| download | libarchive-fd7e0c02e272913a0a8b6d492c7260dfca0b1408.tar.gz | |
Reject cpio symlinks that exceed 1MB
Diffstat (limited to 'libarchive/archive_read_support_format_cpio.c')
| -rw-r--r-- | libarchive/archive_read_support_format_cpio.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libarchive/archive_read_support_format_cpio.c b/libarchive/archive_read_support_format_cpio.c index c2ca85bd..b09db0e9 100644 --- a/libarchive/archive_read_support_format_cpio.c +++ b/libarchive/archive_read_support_format_cpio.c @@ -401,6 +401,11 @@ archive_read_format_cpio_read_header(struct archive_read *a, /* If this is a symlink, read the link contents. */ if (archive_entry_filetype(entry) == AE_IFLNK) { + if (cpio->entry_bytes_remaining > 1024 * 1024) { + archive_set_error(&a->archive, ENOMEM, + "Rejecting malformed cpio archive: symlink contents exceed 1 megabyte"); + return (ARCHIVE_FATAL); + } h = __archive_read_ahead(a, (size_t)cpio->entry_bytes_remaining, NULL); if (h == NULL) |