EulerOS Virtualization 3.0.6.6 : sudo (EulerOS-SA-2021-1520)

high Nessus Plugin ID 147107
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VPR Score: 9.8

Synopsis

The remote EulerOS Virtualization host is missing multiple security updates.

Description

According to the versions of the sudo package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

- selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not vulnerable.(CVE-2021-23240)

- The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.(CVE-2021-23239)

- Sudo before 1.9.5p2 has a Heap-based Buffer Overflow, allowing privilege escalation to root via 'sudoedit -s' and a command-line argument that ends with a single backslash character.(CVE-2021-3156)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected sudo packages.

See Also

http://www.nessus.org/u?e78abe55

Plugin Details

Severity: High

ID: 147107

File Name: EulerOS_SA-2021-1520.nasl

Version: 1.3

Type: local

Published: 3/4/2021

Updated: 3/15/2021

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: High

VPR Score: 9.8

CVSS v2.0

Base Score: 7.2

Temporal Score: 6.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:H/RL:OF/RC:C

CVSS v3.0

Base Score: 7.8

Temporal Score: 7.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:sudo, cpe:/o:huawei:euleros:uvp:3.0.6.6

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/uvp_version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/4/2021

Exploitable With

Metasploit (Sudo Heap-Based Buffer Overflow)

Reference Information

CVE: CVE-2021-23239, CVE-2021-23240, CVE-2021-3156