CVE-2016-6834

Publication date 18 August 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The net_tx_pkt_do_sw_fragmentation function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a zero length for the current fragment length.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	16.10 yakkety	Fixed 1:2.6.1+dfsg-0ubuntu5.1
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.6
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.30
	12.04 LTS precise	Not in release
qemu-kvm	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
qemu	Upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=ead315e43ea0c2ca3491209c6c8db8ce3f2bbe05 Upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=3b9717a62bf5882abaf6602c077cdbe63dffc35e

Severity score breakdown

Parameter	Value
Base score	4.4 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3125-1
QEMU vulnerabilities
9 November 2016