CVE-2009-0034

parse.c in sudo 1.6.9p17 through 1.6.9p19 does not properly interpret a system group (aka %group)...

7.8 HighFix available

parse.c in sudo 1.6.9p17 through 1.6.9p19 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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.41%Down 1.1 points since Feb 4, 2022

What each source reports

NVD Score used 7.8

Record: CVE-2009-0034
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.9 MediumAV:L/AC:M/Au:N/C:C/I:C/A:C
Weakness: CWE-863
Updated: 2026-11-02

CVE List No score

Record: CVE-2009-0034
Updated: 2026-11-02

EUVDEUVD-2009-0045 No score

Record: EUVD-2009-0045
Updated: 2026-11-03

GitHub AdvisoriesGHSA-4x95-346p-g442 7.8

parse.c in sudo 1.6.9p17 through 1.6.9p19 does not properly interpret a system group (aka %group)...

Record: GHSA-4x95-346p-g442
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-863
Updated: 2026-11-02

OSV 7.8

Record: CVE-2009-0034
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2009-0034 7.8

Record: DEBIAN-CVE-2009-0034
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`sudo` Debian:12	before 1.6.9p17-2	1.6.9p17-2
`sudo` Debian:13	before 1.6.9p17-2	1.6.9p17-2
`sudo` Debian:14	before 1.6.9p17-2	1.6.9p17-2
`sudo` Red Hat:enterprise_linux:5::client	before 0:1.6.9p17-3.el5_3.1	0:1.6.9p17-3.el5_3.1
`sudo-debuginfo` Red Hat:enterprise_linux:5::client	before 0:1.6.9p17-3.el5_3.1	0:1.6.9p17-3.el5_3.1
`sudo` Red Hat:enterprise_linux:5::server	before 0:1.6.9p17-3.el5_3.1	0:1.6.9p17-3.el5_3.1
`sudo-debuginfo` Red Hat:enterprise_linux:5::server	before 0:1.6.9p17-3.el5_3.1	0:1.6.9p17-3.el5_3.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-0034 is a high vulnerability (CVSS 7.8) in Gratisoft Sudo, published January 30, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in sudo 1.6.9p17-2.

References

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