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TITLE:
lio-utils Debug Mode Logic Error Temporary File Security Issue

SECUNIA ADVISORY ID:
SA47377

VERIFY ADVISORY:
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http://secunia.com/advisories/47377/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=47377

RELEASE DATE:
2012-01-03

DISCUSS ADVISORY:
http://secunia.com/advisories/47377/#comments

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http://secunia.com/advisories/47377/

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DESCRIPTION:
A security issue has been reported in lio-utils, which can be
exploited by malicious, local users to perform certain actions with
escalated privileges.

The security issue is caused due to a logic error within the
/etc/init.d/target script when checking for the debug mode, which can
lead to the script running in debug mode although it's not configured
to do so. As the script creates the temporary file /tmp/tgtctl.dbug
in an insecure manner when running in debug mode, this can be
exploited to e.g. append data to arbitrary files via symlink
attacks.

The security issue is reported in version 4.1 Other versions may also
be affected.

SOLUTION:
Restrict access to trusted users.

PROVIDED AND/OR DISCOVERED BY:
Reported in a Debian bug by Aurelien Jarno.

ORIGINAL ADVISORY:
Debian Bug #654262:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654262

OTHER REFERENCES:
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http://secunia.com/vulnerability_intelligence/

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EXTENDED DESCRIPTION:
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EXTENDED SOLUTION:
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EXPLOIT:
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