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TITLE:
Atheme "myuser_delete()" Certificate Fingerprint Handling
Vulnerability

SECUNIA ADVISORY ID:
SA48481

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/48481/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=48481

RELEASE DATE:
2012-03-22

DISCUSS ADVISORY:
http://secunia.com/advisories/48481/#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/48481/

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=48481

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 vulnerability has been reported in Atheme, which can be exploited
by malicious users to bypass certain security restrictions or cause a
DoS (Denial of Service).

The vulnerability is caused due to an error within the
"myuser_delete()" function (libathemecore/account.c), which does not
delete certificate fingerprints when deleting accounts. This can be
exploited to drop an account and reconnect as another user using the
same fingerprint or crash the server.

The vulnerability is reported in versions prior to 5.2.7 and 6.0.10.

SOLUTION:
Update to version 5.2.7 or 6.0.10.

PROVIDED AND/OR DISCOVERED BY:
Aaron M. D. Jones in a bug report.

ORIGINAL ADVISORY:
ASA-2012-03-01:
http://archives.neohapsis.com/archives/fulldisclosure/2012-03/0248.html
http://jira.atheme.org/browse/SRV-166

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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