Ubuntu update for linux

Published: 2023-07-26 | Updated: 2023-09-04

Risk	Low
Patch available	YES
Number of vulnerabilities	12
CVE-ID	CVE-2023-0458 CVE-2023-1611 CVE-2023-2124 CVE-2023-2162 CVE-2023-2513 CVE-2023-3090 CVE-2023-3141 CVE-2023-3159 CVE-2023-3161 CVE-2023-3268 CVE-2023-3390 CVE-2023-35001
CWE-ID	CWE-476 CWE-416 CWE-125 CWE-787 CWE-682
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #12 is available.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-4.4.0-1121-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1159-aws (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-243-generic (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-243-lowlatency (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-4.4.0-1122-kvm (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 12 vulnerabilities.

1) NULL pointer dereference

EUVDB-ID: #VU76223

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-0458

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 in the do_prlimit() function. 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: 14.04 - 16.04

linux-image-4.4.0-1121-aws (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-1159-aws (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-243-generic (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-243-lowlatency (Ubuntu package): before Ubuntu Pro

linux-image-4.4.0-1122-kvm (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)

CPE2.3

External links

https://ubuntu.com/security/notices/USN-6254-1

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) Use-after-free

EUVDB-ID: #VU75204

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-1611

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 within the btrfs_search_slot() function in fs/btrfs/ctree.c. A local user can trigger a use-after-free error and crash the kernel.