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TITLE:
Zope PluggableAuthService User Login Name Change Security Issue

SECUNIA ADVISORY ID:
SA44764

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/44764/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=44764

RELEASE DATE:
2011-05-31

DISCUSS ADVISORY:
http://secunia.com/advisories/44764/#comments

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

http://secunia.com/advisories/44764/

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=44764

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * 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 Zope, which can be exploited by
malicious users to manipulate certain data and cause a DoS (Denial of
Service).

The security issue is caused due to the "updateUser()" method of the
ZODBUserManager class (ZODBUserManager.py) within the
PluggableAuthService (PAS) framework not checking the uniqueness of a
login name. This can be exploited to prevent a user from logging in
when an attacker changes his login name to a victim's login name.

The security issue is reported in version 2.11.8. Prior versions may
also be affected.

SOLUTION:
Fixed in the SVN repository.

PROVIDED AND/OR DISCOVERED BY:
Reported by Alan Hoey in a bug report.

ORIGINAL ADVISORY:
Zope:
https://mail.zope.org/pipermail/zope-announce/2011-May/002257.html

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
vulnerabilities.

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