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CVE-2019-12068

Publication date 24 September 2019

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

3.8 · Low

Score breakdown

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

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
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

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

References

Related Ubuntu Security Notices (USN)

Other references