A flaw was found in qemu Media Transfer Protocol (MTP). The code opening files in usb_mtp_get_object and usb_mtp_get_partial_object and directories in usb_mtp_object_readdir doesn't consider that the underlying filesystem may have changed since the time lstat(2) was called in usb_mtp_object_alloc, a classical TOCTTOU problem. An attacker with write access to the host filesystem shared with a guest can use this property to navigate the host filesystem in the context of the QEMU process and read any file the QEMU process has access to. Access to the filesystem may be local or via a network share protocol such as CIFS.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
qemu qemu |
||
debian debian linux 8.0 |
||
debian debian linux 9.0 |
||
fedoraproject fedora 29 |
||
fedoraproject fedora 30 |
||
canonical ubuntu linux 16.04 |
||
canonical ubuntu linux 14.04 |
||
canonical ubuntu linux 18.04 |
||
canonical ubuntu linux 18.10 |
||
opensuse leap 42.3 |
Vulmon