From upstream advisory at $URL: Summary: Improper cleanup of CertFP entries may result in undefined behaviour for an IRC system using Atheme IRC Services as an IRC services implementation. If an account is expired or dropped, CertFP entries will linger, occasionally pointing to an unallocated object (which triggers an exceptional condition) or another account object. Thusly, if an attacker creates an account and then registers their CertFP fingerprint with that account and deletes it, they may be able to gain access to another account in the future without that account being aware of it. Such a condition can also cause inconsistencies in the object store when marshalled to disk, resulting in an exceptional condition on demarshalling, such as when services is restarted. This vulnerability was introduced when CertFP support was added to Atheme IRC Services. A denial of service against an IRC network's services daemon can have devastating effects as a typical IRC network is dependent on the availability of services for directory, nickname and channel ACL enforcement. This vulnerability was discovered by "Aaron M. D. Jones" and was reported to us by him. The bug report is at: http://jira.atheme.org/browse/SRV-166 Upgrading to the latest release for the branch you are using is strongly encouraged. A patch release for all currently maintained versions of Atheme IRC Services was released on the same day, March 20th. Details: The account destructor did not call mycertfp_delete() on the CertFP entries associated with an account object. As a result, the certfp entries linger. To exploit, register an account with your CertFP entry and then delete it. Then reconnect to the network after a couple of new accounts are registered. You may be authenticated to one of those new accounts, or services will crash.
Both stable by jd. @security, the advisory says privilege escalation or crash. Can you check and/or vote please?
Thanks, everyone. GLSA Vote: yes.
YES too, request filed.
This issue was resolved and addressed in GLSA 201209-09 at http://security.gentoo.org/glsa/glsa-201209-09.xml by GLSA coordinator Sean Amoss (ackle).
CVE-2012-1576 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-1576): The myuser_delete function in libathemecore/account.c in Atheme 5.x before 5.2.7, 6.x before 6.0.10, and 7.x before 7.0.0-beta2 does not properly clean up CertFP entries when a user is deleted, which allows remote attackers to access a different user account or cause a denial of service (daemon crash) via a login as a deleted user.
