Ubuntu update for qemu

1) Out-of-bounds write

EUVDB-ID: #VU45985

Risk: Medium

CVSSv4.0: 7.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2020-14364

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: Yes

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error within the USB emulator in QEMU. A remote user with access to guest operating system on the guest operating system can send specially crafted USB packets, trigger out-of-bounds write and execute arbitrary code on the host system.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.6

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.6

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-utils (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-user-static (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-user-binfmt (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-user (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-misc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-system-common (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-kvm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-guest-agent (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

qemu-block-extra (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.46

CPE2.3

• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:qemu-system-x86-xen:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-x86-microvm:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-x86_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-sparc_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-s390x_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-ppc_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-mips_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-arm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-aarch64_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-utils_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-user-static_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-user-binfmt_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-user_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-misc_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-system-common_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-guest-agent_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:qemu-block-extra_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-4511-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.