Detections
Analytics
EulerOS 2.0 SP8 : sudo (EulerOS-SA-2021-1173)
high Nessus Plugin ID 145745
Synopsis
The remote EulerOS host is missing multiple security updates.Description
According to the versions of the sudo package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :- 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)
- 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)
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
Plugin Details
Severity: High
ID: 145745
File Name: EulerOS_SA-2021-1173.nasl
Version: 1.9
Type: local
Family: Huawei Local Security Checks
Published: 2/1/2021
Updated: 1/18/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.7
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 6.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2021-3156
CVSS v3
Risk Factor: High
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: CVSS:3.0/E:H/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:huawei:euleros:sudo, cpe:/o:huawei:euleros:2.0
Required KB Items: Host/local_checks_enabled, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp
Excluded KB Items: Host/EulerOS/uvp_version
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 2/1/2021
CISA Known Exploited Vulnerability Due Dates: 4/27/2022
Exploitable With
CANVAS (CANVAS)
Core Impact
Metasploit (Sudo Heap-Based Buffer Overflow)