CVE-2017-15124

Published: 9 January 2018

VNC server implementation in Quick Emulator (QEMU) 2.11.0 and older was found to be vulnerable to an unbounded memory allocation issue, as it did not throttle the framebuffer updates sent to its client. If the client did not consume these updates, VNC server allocates growing memory to hold onto this data. A malicious remote VNC client could use this flaw to cause DoS to the server host.

Notes

Author	Note
mdeslaur	complex backport, not going to fix this in xenial and earlier

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
qemu Launchpad, Ubuntu, Debian	artful	Released (1:2.10+dfsg-0ubuntu3.5)
	precise	Does not exist
	trusty	Ignored
	upstream	Needs triage
	xenial	Ignored
	zesty	Ignored (reached end-of-life)
	Patches: upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=e2b72cb6e0443d90d7ab037858cb6834b6cca852 upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=ada8d2e4369ea49677d8672ac81bce73eefd5b54 upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=f887cf165db20f405cb8805c716bd363aaadf815
qemu-kvm Launchpad, Ubuntu, Debian	artful	Does not exist
	precise	Ignored
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
	zesty	Does not exist

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Bugs

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=884806

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