Ubuntu update for qemu



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-6683
CVE-2023-6693
CVE-2024-24474
CWE-ID CWE-476
CWE-121
CWE-191
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

qemu-system-x86-xen (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

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU87738

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-6683

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error when processing ClientCutText messages within the QEMU built-in VNC server. A remote authenticated VNC client can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 22.04

qemu-system-x86-xen (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-sparc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-s390x (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-ppc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-misc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-mips (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-arm (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6954-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Stack-based buffer overflow

EUVDB-ID: #VU87161

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-6693

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when flushing TX in the virtio_net_flush_tx() function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. A local user can trigger a stack based buffer overflow and execute arbitrary code on the system.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 22.04

qemu-system-x86-xen (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-sparc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-s390x (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-ppc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-misc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-mips (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-arm (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6954-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

3) Integer underflow

EUVDB-ID: #VU88538

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-24474

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer underflow within the esp_do_nodma() function in hw/scsi/esp.c. A local user can pass specially crafted data to the application, trigger an integer underflow and perform a denial of service (DoS) attack.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 22.04

qemu-system-x86-xen (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-sparc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-s390x (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-ppc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-misc (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-mips (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system-arm (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

qemu-system (Ubuntu package): before 1:6.2+dfsg-2ubuntu6.22

CPE2.3 External links

https://ubuntu.com/security/notices/USN-6954-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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



###SIDEBAR###