----------------------------------------------------------------------


Meet Secunia @ Microsoft Management Summit (MMS) in Las Vegas, USA (21-25 March).

https://secunia.com/company/events/mms_2011/


----------------------------------------------------------------------

TITLE:
Python urllib.request "file://" Redirect Security Issue

SECUNIA ADVISORY ID:
SA43883

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/43883/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43883

RELEASE DATE:
2011-03-26

DISCUSS ADVISORY:
https://secunia.com/advisories/43883/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

https://secunia.com/advisories/43883/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=43883

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

https://secunia.com/vulnerability_scanning/personal/
https://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.request 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.request 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:
https://bugs.python.org/issue11662

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

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

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

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

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

----------------------------------------------------------------------

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.

Subscribe:
https://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
https://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------