Sudo Input Validation Flaw in Perl-related Environment Variables Lets Certain Local Users Execute Arbitrary Perl Code
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SecurityTracker Alert ID: 1015192
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SecurityTracker URL: http://securitytracker.com/id?1015192
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Nov 11 2005
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Impact: Execution of arbitrary code via local system, User access via local system
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): prior to 1.6.8p12
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Description: A vulnerability was reported in Sudo. A local user with permission to run a perl script can execute arbitrary perl code.
Sudo does not properly validate the PERL5LIB, PERLLIB, and PERL5OPT environment variables. A local user with sudo permissions to
run a perl script (without the tainting option) can set these variables to execute an arbitrary file with a name that is identical
to the name of a system library included by the perl script.
Charles Morris discovered this vulnerability.
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Impact: A local user with permissions to run a perl script can execute arbitrary perl code on the target system.
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Solution: The vendor has issued a fixed version (1.6.8p12), available at:
http://www.sudo.ws/sudo/download.html
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Vendor URL: www.sudo.ws/sudo/alerts/perl_env.html (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any)
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Message History:
None.
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Source Message Contents
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Date: Fri, 11 Nov 2005 01:38:01 -0500
Subject: Perl scripts run via Sudo can be subverted
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http://www.sudo.ws/sudo/alerts/perl_env.html
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