CVE-2017-15124

Publication date 9 January 2018

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	17.10 artful	Fixed 1:2.10+dfsg-0ubuntu3.5
	17.04 zesty	Ignored
	16.04 LTS xenial	Ignored
	14.04 LTS trusty	Ignored
qemu-kvm	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Notes

mdeslaur

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

Patch details

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

Package	Patch details
qemu	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

Severity score breakdown

Parameter	Value
Base score	7.5 · High
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

Related Ubuntu Security Notices (USN)

USN-3575-1
QEMU vulnerabilities
20 February 2018