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TITLE:
Ruby "FileUtils.remove_entry_secure" Race Condition Security Issue

SECUNIA ADVISORY ID:
SA43434

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43434/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43434

RELEASE DATE:
2011-03-03

DISCUSS ADVISORY:
http://secunia.com/advisories/43434/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/43434/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=43434

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
A security issue has been reported in Ruby, which can be exploited by
malicious, local users to perform certain actions with escalated
privileges.

The security issue is caused due to a race condition within the
"FileUtils.remove_entry_secure" method, which can be exploited to
delete arbitrary directories and files via symlink attacks.

The security issue is reported in versions 1.8.6 patchlevel 420 and
prior, 1.8.7 patchlevel 330 and prior, 1.9.1 patchlevel 430 and
prior, and 1.9.2 patchlevel 136 and prior.

SOLUTION:
Update to versions 1.8.7-334, 1.9.1-p431, or 1.9.2-p180.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
Ruby:
http://www.ruby-lang.org/en/news/2011/02/18/fileutils-is-vulnerable-to-symlink-race-attacks/

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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About:
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private users keeping their systems up to date against the latest
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