Ubuntu update for linux

1) Use-after-free

EUVDB-ID: #VU68424

Risk: Low

CVSSv4.0: 5.9 [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:U/U:Clear]

CVE-ID: CVE-2020-16119

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error caused by the reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 12.04 - 14.04

linux-image-3.2.0-149-generic (Ubuntu package): before 3.2.0-149.196

linux-image-3.2.0-149-highbank (Ubuntu package): before 3.2.0-149.196

linux-image-3.2.0-149-generic-pae (Ubuntu package): before 3.2.0-149.196

linux-image-3.2.0-149-omap (Ubuntu package): before 3.2.0-149.196

linux-image-3.2.0-149-virtual (Ubuntu package): before 3.2.0-149.196

linux-image-lowlatency (Ubuntu package): before 3.13.0.182.191

linux-image-generic-lpae (Ubuntu package): before 3.13.0.182.191

linux-image-3.13.0-182-lowlatency (Ubuntu package): before 3.13.0-182.233~12.04.1

linux-image-3.13.0-182-generic-lpae (Ubuntu package): before 3.13.0-182.233~12.04.1

linux-image-highbank (Ubuntu package): before 3.13.0.182.191

linux-image-3.13.0-182-generic (Ubuntu package): before 3.13.0-182.233~12.04.1

linux-image-generic (Ubuntu package): before 3.13.0.182.191

linux-image-omap (Ubuntu package): before 3.13.0.182.191

linux-image-virtual (Ubuntu package): before 3.13.0.182.191

linux-image-lowlatency-pae (Ubuntu package): before 3.13.0.182.191

linux-image-generic-pae (Ubuntu package): before 3.13.0.182.191

linux-image-server (Ubuntu package): before 3.13.0.182.191

CPE2.3

• cpe:2.3:o:canonical:ubuntu:12.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:linux-image-3_2_0-149-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-3_2_0-149-highbank_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-3_2_0-149-generic-pae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-3_2_0-149-omap_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-3_2_0-149-virtual_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-3_13_0-182-lowlatency_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-3_13_0-182-generic-lpae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-highbank_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-3_13_0-182-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-omap_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-virtual_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-lowlatency-pae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-generic-pae_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:linux-image-server:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-4580-1

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.