TITLE:
Sudo Perl Environment Cleaning Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA17534

VERIFY ADVISORY:
http://secunia.com/advisories/17534/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
Sudo 1.x
http://secunia.com/product/3929/

DESCRIPTION:
A vulnerability has been reported in Sudo, which can be exploited by
malicious, local users to gain escalated privileges.

The vulnerability is caused due to an error within the environment
cleaning. This can be exploited by a user with sudo access to a perl
script to load and execute arbitrary library files via the "PERLLIB",
"PERL5LIB" and the "PERL5OPT" environment variables.

The vulnerability is related to:
SA17318

Successful exploitation requires that the perl "tainting" option is
not enabled.

The vulnerability has been reported in versions prior to 1.6.8p12.

SOLUTION:
Update to version 1.6.8p12 or later.
http://www.sudo.ws/sudo/download.html

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Charles Morris.

ORIGINAL ADVISORY:
http://www.sudo.ws/sudo/alerts/perl_env.html

OTHER REFERENCES:
SA17318:
http://secunia.com/advisories/17318/

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