CVE-2019-12068

Publication date 24 September 2019

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

In QEMU 1:4.1-1, 1:2.1+dfsg-12+deb8u6, 1:2.8+dfsg-6+deb9u8, 1:3.1+dfsg-8~deb10u1, 1:3.1+dfsg-8+deb10u2, and 1:2.1+dfsg-12+deb8u12 (fixed), when executing script in lsi_execute_script(), the LSI scsi adapter emulator advances 's->dsp' index to read next opcode. This can lead to an infinite loop if the next opcode is empty. Move the existing loop exit after 10k iterations so that it covers no-op opcodes as well.

From the Ubuntu Security Team

It was discovered that the LSI SCSI adapter emulator implementation in QEMU did not properly validate executed scripts. A local attacker could use this to cause a denial of service.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	21.04 hirsute	Fixed 1:4.2-1ubuntu1
	20.10 groovy	Fixed 1:4.2-1ubuntu1
	20.04 LTS focal	Fixed 1:4.2-1ubuntu1
	19.10 eoan	Fixed 1:4.0+dfsg-0ubuntu9.1
	19.04 disco	Fixed 1:3.1+dfsg-2ubuntu3.6
	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.20
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.42
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.47 Ubuntu Pro
qemu-kvm	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	19.04 disco	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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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=de594e47659029316bbf9391efb79da0a1a08e08

Severity score breakdown

Parameter	Value
Base score	3.8 · Low
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L