Bug 1381481 (CVE-2017-2591)

Summary:	CVE-2017-2591 389-ds-base: Heap buffer overflow in uiduniq.c
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	amaris, cbuissar, edewata, fweimer, mreynolds, nhosoi, nkinder, rmeggins
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	389-ds-base 1.3.6	Doc Type:	If docs needed, set a value
Doc Text:	It was found that the uniqueness_entry_to_config() function, used by the "attribute uniqueness" plugin of 389 Directory Server, did not properly NULL terminate an array used in some configuration. An authenticated, or possibly unauthenticated, attacker could use this flaw to force an out-of-bound heap memory read, possibly triggering a crash of the LDAP service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-01-19 10:59:15 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1381483
Bug Blocks:	1381482

Description Adam Mariš 2016-10-04 08:58:22 UTC

The "attribute uniqueness" plugin did not properly NULL-terminate an array when building up its configuration, if a so called 'old-style' configuration, was being used (Using nsslapd-pluginarg<X> parameters) .

A attacker, authenticated, but possibly also unauthenticated, could possibly force the plugin to read beyond allocated memory and trigger a segfault.

The crash could also possibly be triggered accidentally.

Upstream patch :https://fedorahosted.org/389/changeset/ffda694dd622b31277da07be76d3469fad86150f/
Affected versions : from 1.3.4.0

Fixed version : 1.3.6

Upstream bug report : https://fedorahosted.org/389/ticket/48986

Comment 1 Adam Mariš 2016-10-04 09:01:26 UTC

Created 389-ds-base tracking bugs for this issue:

Affects: fedora-all [bug 1381483]

Comment 2 Noriko Hosoi 2016-11-14 22:07:51 UTC

Fixed in 389-ds-base-1.3.6 and newer.

Note: 389-ds-base-1.3.6 is available for F26 (current rawhide).

Comment 9 Cedric Buissart 2017-01-19 10:56:20 UTC

Statement:

Red Hat Product Security has rated this issue as having Low security
impact, a future update may address this flaw.