Ubuntu update for linux

1) Use-after-free

EUVDB-ID: #VU75448

Risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2023-1829

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

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

The vulnerability exists due to a use-after-free error within the tcindex_delete() function. A local user can trigger a use-after-free error and execute arbitrary code with root privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 20.04

linux-image-gkeop (Ubuntu package): before 5.4.0.1068.66

linux-image-gcp-lts-20.04 (Ubuntu package): before 5.4.0.1104.106

linux-image-ibm-lts-20.04 (Ubuntu package): before 5.4.0.1048.74

linux-image-4.15.0-210-lowlatency (Ubuntu package): before Ubuntu Pro

linux-image-4.15.0-210-generic (Ubuntu package): before Ubuntu Pro

linux-image-4.15.0-1149-gcp (Ubuntu package): before Ubuntu Pro

linux-image-4.15.0-1164-azure (Ubuntu package): before Ubuntu Pro

linux-image-4.15.0-1118-oracle (Ubuntu package): before Ubuntu Pro

linux-image-lowlatency (Ubuntu package): before 4.15.0.210.193

linux-image-generic-lpae (Ubuntu package): before 4.15.0.210.193

linux-image-oracle-lts-20.04 (Ubuntu package): before 5.4.0.1100.93

linux-image-oem (Ubuntu package): before 5.4.0.148.146

linux-image-kvm (Ubuntu package): before 4.15.0.1139.130

linux-image-gke (Ubuntu package): before 5.4.0.1098.103

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1098.103

linux-image-5.4.0-1098-gke (Ubuntu package): before 5.4.0-1098.105

linux-image-5.4.0-1068-gkeop (Ubuntu package): before 5.4.0-1068.72

linux-image-generic-hwe-18.04-edge (Ubuntu package): before 5.4.0.148.146

linux-image-aws-lts-20.04 (Ubuntu package): before 5.4.0.1101.98

linux-image-generic-lpae-hwe-18.04-edge (Ubuntu package): before 5.4.0.148.146

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1068.66

linux-image-5.4.0-1090-kvm (Ubuntu package): before 5.4.0-1090.96

linux-image-azure-lts-20.04 (Ubuntu package): before 5.4.0.1107.100

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.148.146

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.148.146

linux-image-ibm (Ubuntu package): before 5.4.0.1048.74

linux-image-generic (Ubuntu package): before 4.15.0.210.193

linux-image-virtual (Ubuntu package): before 4.15.0.210.193

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.148.146

linux-image-5.4.0-1048-ibm (Ubuntu package): before 5.4.0-1048.53~18.04.1

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.148.165~18.04.119

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.148.165~18.04.119

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1118.123

linux-image-oracle (Ubuntu package): before 5.4.0.1100.109~18.04.72

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.148.165~18.04.119

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1149.163

linux-image-gcp (Ubuntu package): before 5.4.0.1104.80

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1164.132

linux-image-azure (Ubuntu package): before 5.4.0.1107.80

linux-image-aws (Ubuntu package): before 5.4.0.1101.79

linux-image-5.4.0-148-lowlatency (Ubuntu package): before 5.4.0-148.165~18.04.1

linux-image-5.4.0-148-generic-lpae (Ubuntu package): before 5.4.0-148.165~18.04.1

linux-image-5.4.0-148-generic (Ubuntu package): before 5.4.0-148.165~18.04.1

linux-image-5.4.0-1107-azure (Ubuntu package): before 5.4.0-1107.113~18.04.1

linux-image-5.4.0-1104-gcp (Ubuntu package): before 5.4.0-1104.113~18.04.1

linux-image-5.4.0-1101-aws (Ubuntu package): before 5.4.0-1101.109~18.04.1

linux-image-5.4.0-1100-oracle (Ubuntu package): before 5.4.0-1100.109~18.04.1

linux-image-4.15.0-210-generic-lpae (Ubuntu package): before 4.15.0-210.221

linux-image-4.15.0-1139-kvm (Ubuntu package): before 4.15.0-1139.144

linux-image-generic-hwe-16.04 (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before Ubuntu Pro (Infra-only)

linux-image-virtual-hwe-16.04 (Ubuntu package): before Ubuntu Pro (Infra-only)

CPE2.3

• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:linux-image-gkeop_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gcp-lts-20.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-ibm-lts-20.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-210-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-210-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-1149-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-1164-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-1118-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-lpae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oracle-lts-20.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oem_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gke-5.4_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1098-gke_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1068-gkeop_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-hwe-18.04-edge_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-aws-lts-20.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-lpae-hwe-18.04-edge_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gkeop-5.4_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1090-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-azure-lts-20.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-lpae-hwe-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oem-osp1_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-ibm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-virtual_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-hwe-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1048-ibm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-virtual-hwe-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-snapdragon-hwe-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oracle-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency-hwe-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gcp-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-azure-lts-18.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-aws_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-148-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-148-generic-lpae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-148-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1107-azure_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1104-gcp_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1101-aws_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-5.4.0-1100-oracle_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-210-generic-lpae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-4.15.0-1139-kvm_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-hwe-16.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency-hwe-16.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-virtual-hwe-16.04_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6047-1

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. However, proof of concept for this vulnerability is available.