Bug 1619450 – CVE-2018-14624 389-ds-base: Server crash through modify command with large DN

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Bug 1619450 - (CVE-2018-14624) CVE-2018-14624 389-ds-base: Server crash through modify command with large DN

Summary:	CVE-2018-14624 389-ds-base: Server crash through modify command with large DN

Status:	CLOSED ERRATA

Aliases:	CVE-2018-14624

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=20180831:0036,...
Keywords:	Security

Duplicates:	1621942 (view as bug list)
Depends On:	1624196 1624198 1614820 1623247 1623721
Blocks:	1619452 1621943
	Show dependency tree / graph

Reported:	2018-08-20 17:13 EDT by Pedro Sampaio
Modified:	2018-10-18 14:07 EDT (History)
CC List:	12 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was discovered in 389-ds-base. The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(). An attacker could send a flood of modifications to a very large DN, which would cause slapd to crash.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-10-18 14:07:35 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
patch for crash in vslapd_log_emergency_error (3.70 KB, patch) 2018-09-04 00:30 EDT, Doran Moppert	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-2018:2757	None	None	None	2018-09-25 15:06 EDT

Groups: None (edit)

Description Pedro Sampaio 2018-08-20 17:13:03 EDT

A flaw was found in 389-ds-base. The server can be crashed by an anonymous client through a ldapmodify command with a large DN argument potentially causing denial of service.

References:

https://bugzilla.redhat.com/show_bug.cgi?id=1614820

Comment 1 Sam Fowler 2018-08-26 20:15:30 EDT

*** Bug 1621942 has been marked as a duplicate of this bug. ***

Comment 8 Doran Moppert 2018-08-30 20:40:54 EDT

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

Affects: fedora-all [bug 1624198]

Comment 9 Salvatore Bonaccorso 2018-09-01 16:38:43 EDT

Hi

Since https://bugzilla.redhat.com/show_bug.cgi?id=1621942 is not accessible/restricted, could you share more information on this issue? (CVE-2018-14624). Which upstream versions are affected, and is there a fix for the issue?

Regards,
Salvatore

Comment 10 Doran Moppert 2018-09-04 00:30 EDT

Created attachment 1480666 [details]
patch for crash in vslapd_log_emergency_error

Adding patch here since it hasn't made its way upstream yet.

Comment 12 Sam Fowler 2018-09-05 19:10:00 EDT

Upstream Bug:

https://pagure.io/389-ds-base/issue/49937


Upstream Patches:

https://pagure.io/389-ds-base/c/8ff8cb850
https://pagure.io/389-ds-base/c/c5e78249d
https://pagure.io/389-ds-base/c/9f28620d2

Comment 13 Salvatore Bonaccorso 2018-09-07 16:22:42 EDT

Doran and Sam: thank you

Comment 14 errata-xmlrpc 2018-09-25 15:05:59 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2757 https://access.redhat.com/errata/RHSA-2018:2757

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