Memory leak in QEMU - CVE-2016-7466
Published: December 10, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU39979
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2016-7466
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the usb_xhci_exit function in hw/usb/hcd-xhci.c in QEMU (aka Quick Emulator), when the xhci uses msix, allows local guest OS administrators to cause a denial of service (memory consumption and possibly QEMU process crash) by repeatedly unplugging a USB device. A remote attacker can perform a denial of service attack.
How to mitigate CVE-2016-7466
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Sources
- http://git.qemu.org/?p=qemu.git;a=commit;h=b53dd4495ced2432a0b652ea895e651d07336f7e
- http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
- http://www.openwall.com/lists/oss-security/2016/09/19/8
- http://www.openwall.com/lists/oss-security/2016/09/20/3
- http://www.securityfocus.com/bid/93029
- https://access.redhat.com/errata/RHSA-2017:2392
- https://access.redhat.com/errata/RHSA-2017:2408
- https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg02773.html
- https://security.gentoo.org/glsa/201611-11