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TITLE:
Joomla! Two Security Bypass Vulnerabilities

SECUNIA ADVISORY ID:
SA48445

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48445/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48445

RELEASE DATE:
2012-03-16

DISCUSS ADVISORY:
http://secunia.com/advisories/48445/#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/48445/

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=48445

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 and a vulnerability have been reported in Joomla!,
which can be exploited by malicious people to bypass certain security
restrictions.

1) Input passed via the "jform[groups]" parameter to index.php when
registering a new user is not properly verified before storing in the
session variable. This can be exploited to register a new user with
administrator privileges.

2) The security issue is caused due to the password generation
algorithm generating predictable passwords, which can be exploited to
guess a generated password when e.g. a password reset for a user is
triggered.

The security issue and vulnerability are reported in versions 2.5.0
through 2.5.2.

SOLUTION:
Update to version 2.5.3.

PROVIDED AND/OR DISCOVERED BY:
1) Jeff Channel.
2) The vendor credits George Argyros and Aggelos Kiayias.

ORIGINAL ADVISORY:
http://www.joomla.org/announcements/release-news/5416-joomla-253-released.html
http://jeffchannell.com/Joomla/joomla-161725-privilege-escalation-vulnerability.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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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.

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

Definitions: (Criticality, Where etc.)
http://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.

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