NewStart CGSL MAIN 6.02 : sudo Multiple Vulnerabilities (NS-SA-2021-0120)

high Nessus Plugin ID 154540

Synopsis

The remote NewStart CGSL host is affected by multiple vulnerabilities.

Description

The remote NewStart CGSL host, running version MAIN 6.02, has sudo packages installed that are affected by multiple vulnerabilities:

- A certain Fedora patch for parse.c in sudo before 1.7.4p5-1.fc14 on Fedora 14 does not properly interpret a system group (aka %group) in the sudoers file during authorization decisions for a user who belongs to that group, which allows local users to leverage an applicable sudoers file and gain root privileges via a sudo command. NOTE: this vulnerability exists because of a CVE-2009-0034 regression. (CVE-2011-0008)

- check.c in sudo 1.7.x before 1.7.4p5, when a Runas group is configured, does not require a password for command execution that involves a gid change but no uid change, which allows local users to bypass an intended authentication requirement via the -g option to a sudo command. (CVE-2011-0010)

- Format string vulnerability in the sudo_debug function in Sudo 1.8.0 through 1.8.3p1 allows local users to execute arbitrary code via format string sequences in the program name for sudo. (CVE-2012-0809)

- sudo 1.6.x and 1.7.x before 1.7.9p1, and 1.8.x before 1.8.4p5, does not properly support configurations that use a netmask syntax, which allows local users to bypass intended command restrictions in opportunistic circumstances by executing a command on a host that has an IPv4 address. (CVE-2012-2337)

- sudo 1.6.0 through 1.7.10p6 and sudo 1.8.0 through 1.8.6p6 allows local users or physically proximate attackers to bypass intended time restrictions and retain privileges without re-authenticating by setting the system clock and sudo user timestamp to the epoch. (CVE-2013-1775)

- sudo 1.3.5 through 1.7.10 and 1.8.0 through 1.8.5, when the tty_tickets option is enabled, does not properly validate the controlling terminal device, which allows local users with sudo permissions to hijack the authorization of another terminal via vectors related to connecting to the standard input, output, and error file descriptors of another terminal. NOTE: this is one of three closely-related vulnerabilities that were originally assigned CVE-2013-1776, but they have been SPLIT because of different affected versions. (CVE-2013-1776)

- sudo before 1.8.12 does not ensure that the TZ environment variable is associated with a zoneinfo file, which allows local users to open arbitrary files for read access (but not view file contents) by running a program within an sudo session, as demonstrated by interfering with terminal output, discarding kernel-log messages, or repositioning tape drives. (CVE-2014-9680)

- sudoedit in Sudo before 1.8.15 allows local users to gain privileges via a symlink attack on a file whose full path is defined using multiple wildcards in /etc/sudoers, as demonstrated by /home/*/*/file.txt.
(CVE-2015-5602)

- sudo before version 1.8.18p1 is vulnerable to a bypass in the sudo noexec restriction if application run via sudo executed wordexp() C library function with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could possibly use this flaw to execute arbitrary commands with elevated privileges. (CVE-2016-7076)

- Todd Miller's sudo version 1.8.20 and earlier is vulnerable to an input validation (embedded spaces) in the get_process_ttyname() function resulting in information disclosure and command execution.
(CVE-2017-1000367)

- ** DISPUTED ** In Sudo through 1.8.29, an attacker with access to a Runas ALL sudoer account can impersonate a nonexistent user by invoking sudo with a numeric uid that is not associated with any user.
NOTE: The software maintainer believes that this is not a vulnerability because running a command via sudo as a user not present in the local password database is an intentional feature. Because this behavior surprised some users, sudo 1.8.30 introduced an option to enable/disable this behavior with the default being disabled. However, this does not change the fact that sudo was behaving as intended, and as documented, in earlier versions. (CVE-2019-19232)

- Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via sudoedit -s and a command-line argument that ends with a single backslash character. (CVE-2021-3156)

- A heap-based buffer overflow was found in the way sudo parses command line arguments. This flaw is exploitable by any local user who can execute the sudo command without authentication. Successful exploitation of this flaw could lead to privilege escalation. (CVE-2021-3156)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the vulnerable CGSL sudo packages. Note that updated packages may not be available yet. Please contact ZTE for more information.

See Also

http://security.gd-linux.com/notice/NS-SA-2021-0120

http://security.gd-linux.com/info/CVE-2011-0008

http://security.gd-linux.com/info/CVE-2011-0010

http://security.gd-linux.com/info/CVE-2012-0809

http://security.gd-linux.com/info/CVE-2012-2337

http://security.gd-linux.com/info/CVE-2013-1775

http://security.gd-linux.com/info/CVE-2013-1776

http://security.gd-linux.com/info/CVE-2014-9680

http://security.gd-linux.com/info/CVE-2015-5602

http://security.gd-linux.com/info/CVE-2016-7076

http://security.gd-linux.com/info/CVE-2017-1000367

http://security.gd-linux.com/info/CVE-2019-19232

http://security.gd-linux.com/info/CVE-2021-3156

Plugin Details

Severity: High

ID: 154540

File Name: newstart_cgsl_NS-SA-2021-0120_sudo.nasl

Version: 1.4

Type: local

Published: 10/27/2021

Updated: 4/7/2022

Risk Information

VPR

Risk Factor: Critical

Score: 9.8

CVSS v2

Risk Factor: High

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

Vulnerability Information

CPE: p-cpe:/a:zte:cgsl_main:sudo, p-cpe:/a:zte:cgsl_main:sudo-debuginfo, p-cpe:/a:zte:cgsl_main:sudo-debugsource, p-cpe:/a:zte:cgsl_main:sudo-devel, cpe:/o:zte:cgsl_main:6

Required KB Items: Host/local_checks_enabled, Host/ZTE-CGSL/release, Host/ZTE-CGSL/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/24/2021

Vulnerability Publication Date: 1/29/2009

CISA Known Exploited Dates: 4/27/2022

Exploitable With

CANVAS (CANVAS)

Metasploit (Sudo Heap-Based Buffer Overflow)

Reference Information

CVE: CVE-2011-0008, CVE-2011-0010, CVE-2012-0809, CVE-2012-2337, CVE-2013-1775, CVE-2013-1776, CVE-2014-9680, CVE-2015-5602, CVE-2016-7076, CVE-2017-1000367, CVE-2019-19232, CVE-2021-3156

IAVA: 2013-A-0179-S, 2017-A-0165-S, 2021-A-0053