Sudo pathname race condition
| sudo-pathname-race-condition (21080) |  High Risk |
Description:
Sudo (superuser do) is vulnerable to a race condition caused by a vulnerability in the pathname validation. A local attacker, using a specific configuration, could use this vulnerability to execute arbitrary code on the system or perform a symlink attack, if a sudoers entry that contains the 'ALL' pseduo-command follows a user's sudoers entry.
Note: Exploitation requires that the user have permission to run multiple commands via Sudo and be able to create symbolic links in the filesystem. Additionally, a sudoers entry that gives a second user access to the ALL pseudo-command must come immediately after the user's sudoers entry in order for this race condition to exist.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Canonical, Ubuntu 5.04
- Conectiva, Linux 10
- Conectiva, Linux 9.0
- Debian, Debian Linux 3.0
- Debian, Debian Linux 3.1
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 10.1
- MandrakeSoft, Mandrake Linux 10.1 X86_64
- MandrakeSoft, Mandrake Linux LE2005
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- OpenPKG, OpenPKG 2.3
- OpenPKG, OpenPKG 2.4
- OpenPKG, OpenPKG CURRENT
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 AS
- RedHat, Linux Advanced Workstation 2.1 Itanium
- SuSE, SuSE Linux 8.2
- SuSE, SuSE Linux 9.0
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux 9.2
- SuSE, SuSE Linux 9.3
- Todd C. Miller, Sudo 1.3.1 to 1.6.8p8
- Turbolinux, Turbolinux 10 Desktop
- Turbolinux, Turbolinux 10 F...
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 7 Workstation
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Home
Remedy:
Upgrade to the latest version of Sudo (1.6.8.p9 or later), available from the Sudo Download Web page. See References.
For Gentoo Linux:
Upgrade to the latest version of sudo (1.6.8_p9 or later), as listed in GLSA 200506-22. See References.
For SUSE Linux:
Upgrade to the latest version of Sudo listed below. Refer to SUSE Security Announcement SUSE-SA:2005:036 for more information. See References.
x86 Platform:
SUSE Linux 8.2: 6.6-192 or later
x86 and x86-64 Platforms:
SUSE Linux 9.3: 6.8p7-3.2 or later
SUSE Linux 9.2: 6.7p5-118.2 or later
SUSE Linux 9.1: 6.7p5-117.4 or later
SUSE Linux 9.0: 6.7p5-120 or later
For Conectiva Linux 9.0 and 10.0:
Upgrade to the latest version of Sudo (1.6.8p9 or later), as listed in Conectiva Linux Security Announcement CLSA-2005:976. See References.
For Debian GNU/Linux:
Refer to DSA-735-1 for patch, upgrade, or suggested workaround information. See References.
For Red Hat Linux:
Refer to RHSA-2005:535-06 for patch, upgrade, or suggested workaround information. See References.
For OpenPKG:
Refer to OpenPKG Security Advisory OpenPKG-SA-2005.012 for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux:
Refer to USN-142-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Gain Access
References:
- Conectiva Linux Announcement CLSA-2005:976, Sudo - Local vulnerability at http://distro.conectiva.com/atualizacoes/index.php?id=a&anuncio=000976.
- Sudo Download Web page, Downloading Sudo at http://www.sudo.ws/sudo/download.html.
- Sudo Web site, Race condition in Sudo's pathname validation at http://www.sudo.ws/sudo/alerts/path_race.html.
- BID-13993: Todd Miller Sudo Local Race Condition Vulnerability
- BID-15647: RETIRED: Apple Mac OS X Security Update 2005-009 Multiple Vulnerabilities
- CVE-2005-1993: Race condition in sudo 1.3.1 up to 1.6.8p8, when the ALL pseudo-command is used after a user entry in the sudoers file, allows local users to gain privileges via a symlink attack.
- DSA-735: sudo -- pathname validation race
- GLSA-200506-22: sudo: Arbitrary command execution
- MDKSA-2005:103: Updated sudo packages fix race condition vulnerability
- OpenPKG-SA-2005.012: sudo
- RHSA-2005-535: sudo security update
- SA15744: Sudo Arbitrary Command Execution Vulnerability
- SA17813: Mac OS X Security Update Fixes Multiple Vulnerabilities
- SUSE-SA:2005:036: sudo: race condition arbitrary code execution
Reported:
Jun 21, 2005
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