An updated sudo package to fix a security issue is now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The sudo (superuser do) utility allows system administrators to give certain users the ability to run commands as root with logging.

A flaw was discovered in a way sudo handled group specifications in 'run as' lists in the sudoers configuration file. If sudo configuration allowed a user to run commands as any user of some group and the user was also a member of that group, sudo incorrectly allowed them to run defined commands with the privileges of any system user.
This gave the user unintended privileges. (CVE-2009-0034)

Users of sudo should update to this updated package, which contains a backported patch to resolve this issue.

- rebase to 1.7.4p5

    - fixed sudo-1.7.4p4-getgrouplist.patch

    - fixes CVE-2011-0008, CVE-2011-0010

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

Multiple vulnerabilities has been found and corrected in sudo :

A a patch for parse.c in sudo 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).

Packages for 2009.0 are provided as of the Extended Maintenance Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149 products_id=490

The updated packages have been upgraded to the latest versions (1.7.4p6) which is not affected by these issues.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, 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)

  - Todd Miller's sudo version 1.8.20p1 and earlier is vulnerable to an input validation (embedded newlines)     in the get_process_ttyname() function resulting in information disclosure and command execution.
    (CVE-2017-1000368)

  - 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.

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.

Harald Koenig discovered that sudo did not correctly handle certain privilege changes when handling groups. If a local attacker belonged to a group included in a 'RunAs' list in the /etc/sudoers file, that user could gain root privileges. This was not an issue for the default sudoers file shipped with Ubuntu.

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

From Red Hat Security Advisory 2009:0267 :

An updated sudo package to fix a security issue is now available for Red Hat Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The sudo (superuser do) utility allows system administrators to give certain users the ability to run commands as root with logging.

A flaw was discovered in a way sudo handled group specifications in 'run as' lists in the sudoers configuration file. If sudo configuration allowed a user to run commands as any user of some group and the user was also a member of that group, sudo incorrectly allowed them to run defined commands with the privileges of any system user.
This gave the user unintended privileges. (CVE-2009-0034)

Users of sudo should update to this updated package, which contains a backported patch to resolve this issue.

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, 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 1.9.5p2 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 these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
35605	RHEL 5 : sudo (RHSA-2009:0267)	Nessus	Red Hat Local Security Checks	2/6/2009	1/14/2021	medium
51566	Fedora 14 : sudo-1.7.4p5-1.fc14 (2011-0470)	Nessus	Fedora Local Security Checks	1/19/2011	1/11/2021	medium
51809	Mandriva Linux Security Advisory : sudo (MDVSA-2011:018)	Nessus	Mandriva Local Security Checks	1/28/2011	1/6/2021	medium
154615	NewStart CGSL CORE 5.04 / MAIN 5.04 : sudo Multiple Vulnerabilities (NS-SA-2021-0101)	Nessus	NewStart CGSL Local Security Checks	10/28/2021	1/17/2023	high
154540	NewStart CGSL MAIN 6.02 : sudo Multiple Vulnerabilities (NS-SA-2021-0120)	Nessus	NewStart CGSL Local Security Checks	10/27/2021	1/17/2023	high
38070	Ubuntu 8.04 LTS / 8.10 : sudo vulnerability (USN-722-1)	Nessus	Ubuntu Local Security Checks	4/23/2009	1/19/2021	medium
51656	Fedora 13 : sudo-1.7.4p5-1.fc13 (2011-0455)	Nessus	Fedora Local Security Checks	1/24/2011	1/11/2021	medium
67801	Oracle Linux 5 : sudo (ELSA-2009-0267)	Nessus	Oracle Linux Local Security Checks	7/12/2013	1/14/2021	medium
160804	NewStart CGSL CORE 5.05 / MAIN 5.05 : sudo Multiple Vulnerabilities (NS-SA-2022-0028)	Nessus	NewStart CGSL Local Security Checks	5/9/2022	1/13/2023	high

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