Ubuntu update for linux

Published: 2023-04-26

Risk	Medium
Patch available	YES
Number of vulnerabilities	5
CVE-ID	CVE-2022-3586 CVE-2022-4095 CVE-2023-1390 CVE-2023-1670 CVE-2023-1829
CWE-ID	CWE-416 CWE-415 CWE-835
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system linux-image-4.4.0-1118-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1119-kvm (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-240-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1156-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-240-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-virtual-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-lowlatency-lts-xenial (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-generic-lts-xenial (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-generic (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
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU69708

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3586

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 16.04

linux-image-4.4.0-1118-aws (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-1119-kvm (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-240-generic (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-1156-aws (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-240-lowlatency (Ubuntu package): before Ubuntu Pro

linux-image-virtual-lts-xenial (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-lowlatency-lts-xenial (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-generic-lts-xenial (Ubuntu package): before Ubuntu Pro (Infra-only)

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

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

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

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

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

External links

http://ubuntu.com/security/notices/USN-6045-1

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) Double Free

EUVDB-ID: #VU69805

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-4095

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the cmd_hdl_filter() function in drivers/staging/rtl8712/rtl8712_cmd.c. A local user can trigger a double free error and execute arbitrary code with escalated privileges.