CVE-2016-8578
Published: 4 November 2016
The v9fs_iov_vunmarshal function in fsdev/9p-iov-marshal.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) by sending an empty string parameter to a 9P operation.
Notes
| Author | Note |
|---|---|
| tyhicks | Privileged user inside the guest can trigger a DoS of the QEMU host process In Trusty and Xenial, the vulnerable code is in the v9fs_unmarshal() function of fsdev/virtio-9p-marshal.c |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
qemu Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
| trusty |
Released
(2.0.0+dfsg-2ubuntu1.30)
|
|
| upstream |
Needed
|
|
| xenial |
Released
(1:2.5+dfsg-5ubuntu10.6)
|
|
| yakkety |
Released
(1:2.6.1+dfsg-0ubuntu5.1)
|
|
|
Patches: upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=ba42ebb863ab7d40adc79298422ed9596df8f73a |
||
|
qemu-kvm Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(code not present)
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| yakkety |
Does not exist
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.0 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Changed |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H |