Ubuntu update for sudo

Published: 2023-05-29

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-28486 CVE-2023-28487
CWE-ID	CWE-78
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system sudo (Ubuntu package) Operating systems & Components / Operating system package or component sudo-ldap (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) OS Command Injection

EUVDB-ID: #VU74196

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-2023-28486

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing control characters in the log messages. A local user can inject specially crafted characters to the log messages and execute arbtirary OS commands on the system when the command is executed from the log (e.g. via the "sudoreplay -l").

Mitigation

Update the affected package sudo to the latest version.

Vulnerable software versions

Ubuntu: 16.04

sudo (Ubuntu package): before Ubuntu Pro (Infra-only)

sudo-ldap (Ubuntu package): before Ubuntu Pro (Infra-only)

External links

http://ubuntu.com/security/notices/USN-6005-2

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) OS Command Injection

EUVDB-ID: #VU74197