Bug 1525628 – CVE-2017-15135 389-ds-base: Authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c

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Bug 1525628 - (CVE-2017-15135) CVE-2017-15135 389-ds-base: Authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c

Summary:	CVE-2017-15135 389-ds-base: Authentication bypass due to lack of size check i...

Status:	ASSIGNED

Aliases:	CVE-2017-15135

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20180122,repor...
Keywords:	Security

Depends On:	1535538 1535539 1544415 1544416
Blocks:	1525629
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Reported:	2017-12-13 13:07 EST by Pedro Sampaio
Modified:	2018-04-20 09:07 EDT (History)
CC List:	8 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:	It was found that 389-ds-base did not always handle internal hash comparison operations correctly during the authentication process. A remote, unauthenticated attacker could potentially use this flaw to bypass the authentication process under very rare and specific circumstances.
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Updated patch based on tbordaz's comments (10.87 KB, patch) 2018-01-18 20:01 EST, wibrown@redhat.com	no flags	Details \| Diff
1.3.6 backport of patch (14.37 KB, patch) 2018-01-29 19:20 EST, wibrown@redhat.com	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:0414	normal	SHIPPED_LIVE	Important: 389-ds-base security and bug fix update	2018-03-06 21:46:53 EST
Red Hat Product Errata	RHSA-2018:0515	normal	SHIPPED_LIVE	Important: 389-ds-base security update	2018-03-13 18:36:35 EDT

Groups: None (edit)

Description Pedro Sampaio 2017-12-13 13:07:34 EST

A flaw was found in 389-ds-base that was introduced after CVE-2016-5405 fix. A lack of size check in slapi_ct_memcmp() function may lead to authentication bypass through pre-hashed userPassword attributes under highly specific circumstances.

Comment 1 Pedro Sampaio 2017-12-13 13:07:39 EST

Acknowledgments:

Name: Martin Poole (Red Hat)

Comment 17 errata-xmlrpc 2018-03-06 16:43:09 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0414 https://access.redhat.com/errata/RHSA-2018:0414

Comment 18 errata-xmlrpc 2018-03-13 14:26:18 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:0515 https://access.redhat.com/errata/RHSA-2018:0515

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