Ubuntu update for qemu

Published: 2024-11-11

Risk	Medium
Patch available	YES
Number of vulnerabilities	9
CVE-ID	CVE-2019-20382 CVE-2020-13765 CVE-2020-1983 CVE-2020-7039 CVE-2020-8608 CVE-2021-3592 CVE-2021-3594 CVE-2023-3019 CVE-2024-4693
CWE-ID	CWE-401 CWE-787 CWE-416 CWE-122 CWE-119 CWE-763 CWE-672
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #3 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system qemu-system-x86-microvm (Ubuntu package) Operating systems & Components / Operating system package or component qemu (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-xen (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-x86-xen (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-x86 (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-sparc (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-s390x (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-ppc (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-misc (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-mips (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-arm (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-common (Ubuntu package) Operating systems & Components / Operating system package or component qemu-system-aarch64 (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 9 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU27388

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-20382

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the zrle_compress_data() function in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd. A remote attacker can perform a denial of service attack.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 24.10

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.30

qemu (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-xen (Ubuntu package): before 1:8.2.2+ds-0ubuntu1.4

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.30

qemu-system-x86 (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-sparc (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-s390x (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-ppc (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-misc (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-mips (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-arm (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system (Ubuntu package): before Ubuntu Pro (Infra-only)

qemu-system-common (Ubuntu package): before Ubuntu Pro

qemu-system-aarch64 (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

https://ubuntu.com/security/notices/USN-7094-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU31806

Risk: Medium

CVSSv4.0: 6.1 [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:U/U:Green]

CVE-ID: CVE-2020-13765

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

Exploit availability: No

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in rom_copy() in hw/core/loader.c. A local user on the guest operating system can create a specially data to the application, trigger out-of-bounds write and execute arbitrary code on the host system.