Ubuntu update for linux

Published: 2023-10-31

Risk	Low
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2023-0597 CVE-2023-31083 CVE-2023-3772 CVE-2023-4132
CWE-ID	CWE-401 CWE-476 CWE-416
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-raspi (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gkeop (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gcp-lts-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-ibm-lts-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-xilinx-zynqmp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-virtual (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-raspi2 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oracle-lts-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-osp1 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gkeop-5.4 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-bluefield (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure-lts-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws-lts-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-166-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-166-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-166-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1119-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1117-gcp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1113-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1112-oracle (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1102-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1097-raspi (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1080-gkeop (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1074-bluefield (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1060-ibm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.4.0-1033-xilinx-zynqmp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-hwe-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-virtual-hwe-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-snapdragon-hwe-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-hwe-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-raspi-hwe-18.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-ibm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gcp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oracle (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU73765

Risk: Low

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

CVE-ID: CVE-2023-0597

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

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to memory leak within the Linux kernel cpu_entry_area mapping of X86 CPU data. A local user can gain access to sensitive information.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1097.127

linux-image-gkeop (Ubuntu package): before 5.4.0.1080.78

linux-image-gcp-lts-20.04 (Ubuntu package): before 5.4.0.1117.119

linux-image-ibm-lts-20.04 (Ubuntu package): before 5.4.0.1060.89

linux-image-xilinx-zynqmp (Ubuntu package): before 5.4.0.1033.33

linux-image-virtual (Ubuntu package): before 5.4.0.166.163

linux-image-raspi2 (Ubuntu package): before 5.4.0.1097.127

linux-image-oracle-lts-20.04 (Ubuntu package): before 5.4.0.1112.105

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.166.163

linux-image-oem (Ubuntu package): before 5.4.0.166.163

linux-image-lowlatency (Ubuntu package): before 5.4.0.166.163

linux-image-kvm (Ubuntu package): before 5.4.0.1102.97

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1080.78

linux-image-generic-lpae (Ubuntu package): before 5.4.0.166.163

linux-image-generic (Ubuntu package): before 5.4.0.166.163

linux-image-bluefield (Ubuntu package): before 5.4.0.1074.69

linux-image-azure-lts-20.04 (Ubuntu package): before 5.4.0.1119.112

linux-image-aws-lts-20.04 (Ubuntu package): before 5.4.0.1113.110

linux-image-5.4.0-166-lowlatency (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-166-generic-lpae (Ubuntu package): before 5.4.0-166.183

linux-image-5.4.0-166-generic (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1119-azure (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1117-gcp (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1113-aws (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1112-oracle (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1102-kvm (Ubuntu package): before 5.4.0-1102.108

linux-image-5.4.0-1097-raspi (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1080-gkeop (Ubuntu package): before 5.4.0-1080.84

linux-image-5.4.0-1074-bluefield (Ubuntu package): before 5.4.0-1074.80

linux-image-5.4.0-1060-ibm (Ubuntu package): before Ubuntu Pro

linux-image-5.4.0-1033-xilinx-zynqmp (Ubuntu package): before 5.4.0-1033.37

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before Ubuntu Pro

linux-image-virtual-hwe-18.04 (Ubuntu package): before Ubuntu Pro

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before Ubuntu Pro

linux-image-generic-hwe-18.04 (Ubuntu package): before Ubuntu Pro

linux-image-raspi-hwe-18.04 (Ubuntu package): before Ubuntu Pro

linux-image-ibm (Ubuntu package): before Ubuntu Pro

linux-image-aws (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-gcp (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-azure (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-oracle (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6462-1

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.

2) NULL pointer dereference

EUVDB-ID: #VU79496

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-2023-31083

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error within the hci_uart_tty_ioctl() function in drivers/bluetooth/hci_ldisc.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.