diff options
| author | Stefan Hajnoczi <stefanha@redhat.com> | 2014-03-26 13:05:28 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-04-01 13:59:47 +0200 |
| commit | f56b9bc3ae20fc93815b34aa022be919941406ce (patch) | |
| tree | 678a4325d4277d2c272f895d01523a863bfb3668 /tests/qemu-iotests/075 | |
| parent | 7b103b36d6ef3b11827c203d3a793bf7da50ecd6 (diff) | |
block/cloop: refuse images with bogus offsets (CVE-2014-0144)
The offsets[] array allows efficient seeking and tells us the maximum
compressed data size. If the offsets are bogus the maximum compressed
data size will be unrealistic.
This could cause g_malloc() to abort and bogus offsets mean the image is
broken anyway. Therefore we should refuse such images.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/075')
| -rwxr-xr-x | tests/qemu-iotests/075 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tests/qemu-iotests/075 b/tests/qemu-iotests/075 index 9c00fa8138..d74fb33272 100755 --- a/tests/qemu-iotests/075 +++ b/tests/qemu-iotests/075 @@ -44,6 +44,7 @@ _supported_os Linux block_size_offset=128 n_blocks_offset=132 +offsets_offset=136 echo echo "== check that the first sector can be read ==" @@ -80,6 +81,20 @@ _use_sample_img simple-pattern.cloop.bz2 poke_file "$TEST_IMG" "$n_blocks_offset" "\x04\x00\x00\x01" $QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir +echo +echo "== refuse images with non-monotonically increasing offsets ==" +_use_sample_img simple-pattern.cloop.bz2 +poke_file "$TEST_IMG" "$offsets_offset" "\x00\x00\x00\x00\xff\xff\xff\xff" +poke_file "$TEST_IMG" $((offsets_offset + 8)) "\x00\x00\x00\x00\xff\xfe\x00\x00" +$QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir + +echo +echo "== refuse images with invalid compressed block size ==" +_use_sample_img simple-pattern.cloop.bz2 +poke_file "$TEST_IMG" "$offsets_offset" "\x00\x00\x00\x00\x00\x00\x00\x00" +poke_file "$TEST_IMG" $((offsets_offset + 8)) "\xff\xff\xff\xff\xff\xff\xff\xff" +$QEMU_IO -c "read 0 512" $TEST_IMG 2>&1 | _filter_qemu_io | _filter_testdir + # success, all done echo "*** done" rm -f $seq.full |