Ubuntu update for linux

Published: 2023-10-31

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-31083 CVE-2023-3772
CWE-ID	CWE-476
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system linux-image-virtual-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-20.04d (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-20.04c (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-20.04b (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oem-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lpae-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-hwe-20.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-64k-hwe-20.04 (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-fde (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure-cvm (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-aws (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-oracle-lts-22.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-oracle (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-nvidia-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-nvidia (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-64k (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-ibm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-gkeop-5.15 (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-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-64k (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-gcp-lts-22.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure-lts-22.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-azure-fde-lts-22.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-aws-lts-22.04 (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-88-lowlatency-64k (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-88-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-88-generic-lpae (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-88-generic-64k (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-88-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1051-azure-fde (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1051-azure (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1049-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1047-oracle (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1046-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1046-gcp (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1042-ibm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1040-nvidia-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1040-nvidia (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.15.0-1032-gkeop (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU79496

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 20.04 - 22.04

linux-image-virtual-hwe-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-oem-20.04d (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-oem-20.04c (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-oem-20.04b (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-oem-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-lowlatency-hwe-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.43

linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.43

linux-image-generic-lpae-hwe-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-generic-hwe-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-generic-64k-hwe-20.04 (Ubuntu package): before 5.15.0.88.98~20.04.46

linux-image-gcp (Ubuntu package): before 5.15.0.1046.54~20.04.1

linux-image-azure-fde (Ubuntu package): before 5.15.0.1051.59~20.04.1.29

linux-image-azure-cvm (Ubuntu package): before 5.15.0.1051.59~20.04.40

linux-image-azure (Ubuntu package): before 5.15.0.1051.59~20.04.40

linux-image-aws (Ubuntu package): before 5.15.0.1049.54~20.04.37

linux-image-virtual (Ubuntu package): before 5.15.0.88.85

linux-image-oracle-lts-22.04 (Ubuntu package): before 5.15.0.1047.42

linux-image-oracle (Ubuntu package): before 5.15.0.1047.53~20.04.1

linux-image-nvidia-lowlatency (Ubuntu package): before 5.15.0.1040.40

linux-image-nvidia (Ubuntu package): before 5.15.0.1040.40

linux-image-lowlatency-64k (Ubuntu package): before 5.15.0.88.90

linux-image-lowlatency (Ubuntu package): before 5.15.0.88.90

linux-image-kvm (Ubuntu package): before 5.15.0.1046.42

linux-image-ibm (Ubuntu package): before 5.15.0.1042.45~20.04.14

linux-image-gkeop-5.15 (Ubuntu package): before 5.15.0.1032.38~20.04.28

linux-image-gkeop (Ubuntu package): before 5.15.0.1032.31

linux-image-generic-lpae (Ubuntu package): before 5.15.0.88.85

linux-image-generic-64k (Ubuntu package): before 5.15.0.88.85

linux-image-generic (Ubuntu package): before 5.15.0.88.85

linux-image-gcp-lts-22.04 (Ubuntu package): before 5.15.0.1046.42

linux-image-azure-lts-22.04 (Ubuntu package): before 5.15.0.1051.47

linux-image-azure-fde-lts-22.04 (Ubuntu package): before 5.15.0.1051.59.29

linux-image-aws-lts-22.04 (Ubuntu package): before 5.15.0.1049.48

linux-image-5.15.0-88-lowlatency-64k (Ubuntu package): before 5.15.0-88.98~20.04.1

linux-image-5.15.0-88-lowlatency (Ubuntu package): before 5.15.0-88.98~20.04.1

linux-image-5.15.0-88-generic-lpae (Ubuntu package): before 5.15.0-88.98~20.04.1

linux-image-5.15.0-88-generic-64k (Ubuntu package): before 5.15.0-88.98~20.04.1

linux-image-5.15.0-88-generic (Ubuntu package): before 5.15.0-88.98~20.04.1

linux-image-5.15.0-1051-azure-fde (Ubuntu package): before 5.15.0-1051.59~20.04.1.1

linux-image-5.15.0-1051-azure (Ubuntu package): before 5.15.0-1051.59~20.04.1

linux-image-5.15.0-1049-aws (Ubuntu package): before 5.15.0-1049.54~20.04.1

linux-image-5.15.0-1047-oracle (Ubuntu package): before 5.15.0-1047.53~20.04.1

linux-image-5.15.0-1046-kvm (Ubuntu package): before 5.15.0-1046.51

linux-image-5.15.0-1046-gcp (Ubuntu package): before 5.15.0-1046.54~20.04.1

linux-image-5.15.0-1042-ibm (Ubuntu package): before 5.15.0-1042.45~20.04.1

linux-image-5.15.0-1040-nvidia-lowlatency (Ubuntu package): before 5.15.0-1040.40

linux-image-5.15.0-1040-nvidia (Ubuntu package): before 5.15.0-1040.40

linux-image-5.15.0-1032-gkeop (Ubuntu package): before 5.15.0-1032.38~20.04.1

External links

http://ubuntu.com/security/notices/USN-6465-1

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: #VU80578

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-3772

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 xfrm_update_ae_params() function in the IP framework for transforming packets (XFRM subsystem). A local user with CAP_NET_ADMIN privileges can perform a denial of service (DoS) attack.