389-ds DoS due to improper handling

2013.11.22
Credit: Vincent Danen
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-20


Ogólna skala CVSS: 4/10
Znaczenie: 2.9/10
Łatwość wykorzystania: 8/10
Wymagany dostęp: Zdalny
Złożoność ataku: Niska
Autoryzacja: Jednorazowa
Wpływ na poufność: Brak
Wpływ na integralność: Brak
Wpływ na dostępność: Częściowy

A flaw in how 389-ds-base and Red Hat Directory Server handled the checking of access rights on entries using GER (Get Effective Rights), a way to extend directory searches to also display what access rights a user has to a specified entry. When an attribute list is given in the search request, and if there are several attributes whose names contain the '@' character, 389-ds-base and Red Hat Directory Server would crash. An attacker able to contact the server would be able to submit this type of search request with no authentication required. https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4485 (Obviously no CVE is required, posting here as this was previously sent to the distros@ mailing list) -- Vincent Danen / Red Hat Security Response Team

Referencje:

http://seclists.org/oss-sec/2013/q4/325
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4485


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