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TITLE:
Python urllib/urllib2 "file://" Redirect Security Issue

SECUNIA ADVISORY ID:
SA43831

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43831/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43831

RELEASE DATE:
2011-03-26

DISCUSS ADVISORY:
http://secunia.com/advisories/43831/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Criticality Level
 * Impact
 * Where
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 * CVE Reference(s)

http://secunia.com/advisories/43831/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=43831

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 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A security issue has been reported in Python, which can be exploited
by malicious people to disclose potentially sensitive information or
cause a DoS (Denial of Service).

The security issue is caused due to the urllib/urlib2 redirect
handling allowing "file://" URL schemes, which can be exploited to
e.g. disclose potentially sensitive information or cause a high
resource consumption by returning specially crafted HTTP redirect
responses to a Python application using the urllib or urllib2 module.

SOLUTION:
Restrict "file://" URL schemes using a firewall with filtering
capabilities.

PROVIDED AND/OR DISCOVERED BY:
Reported to the vendor by an unknown person.

ORIGINAL ADVISORY:
Python Bug #11662:
http://bugs.python.org/issue11662

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:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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