Multiple integer overflows in the block drivers in QEMU, possibly...

Vulnerability Description

Multiple integer overflows in the block drivers in QEMU, possibly before 2.0.0, allow local users to cause a denial of service (crash) via a crafted catalog size in (1) the parallels_open function in block/parallels.c or (2) bochs_open function in bochs.c, a large L1 table in the (3) qcow2_snapshot_load_tmp in qcow2-snapshot.c or (4) qcow2_grow_l1_table function in qcow2-cluster.c, (5) a large request in the bdrv_check_byte_request function in block.c and other block drivers, (6) crafted cluster indexes in the get_refcount function in qcow2-refcount.c, or (7) a large number of blocks in the cloop_open function in cloop.c, which trigger buffer overflows, memory corruption, large memory allocations and out-of-bounds read and writes.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1079140
• http://rhn.redhat.com/errata/RHSA-2014-0420.html
• http://rhn.redhat.com/errata/RHSA-2014-0421.html
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6a83f8b5bec6f59e56cc49bd49e4c3f8f805d56f
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=e3737b820b45e54b059656dc3f914f895ac7a88b
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=afbcc40bee4ef51731102d7d4b499ee12fc182e1
• http://www.debian.org/security/2014/dsa-3044
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=509a41bab5306181044b5fff02eadf96d9c8676a
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=8f4754ede56e3f9ea3fd7207f4a7c4453e59285b
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=db8a31d11d6a60f48d6817530640d75aa72a9a2f
• http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=cab60de930684c33f67d4e32c7509b567f8c445b