Red Hat Enterprise Linux Desktop 6/7 389 Directory Server Timing Password information management

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Red Hat Enterprise Linux Desktop, Enterprise Linux HPC Node, Enterprise Linux Server and Enterprise Linux Workstation 6/7. This issue affects some unknown processing of the component 389 Directory Server. This manipulation as part of Timing causes information management (Password). The identification of this vulnerability is CVE-2016-5405. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux Desktop, Enterprise Linux HPC Node, Enterprise Linux Server and Enterprise Linux Workstation 6/7 (Operating System). It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component 389 Directory Server. The manipulation as part of a Timing leads to a information management vulnerability (Password). The CWE definition for the vulnerability is CWE-199. As an impact it is known to affect confidentiality. The summary by CVE is:

389 Directory Server in Red Hat Enterprise Linux Desktop 6 through 7, Red Hat Enterprise Linux HPC Node 6 through 7, Red Hat Enterprise Linux Server 6 through 7, and Red Hat Enterprise Linux Workstation 6 through 7 allows remote attackers to obtain user passwords.

The bug was discovered 11/03/2016. The weakness was shared 06/08/2017 by William Brown with Red Hat (Website). It is possible to read the advisory at rhn.redhat.com. This vulnerability is known as CVE-2016-5405 since 06/10/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a private exploit is available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK. William Brown explains the risk as follows: "This attack only affects very specific configurations of directory server. The issue is rated as "low" as a result. This only affects unsalted or clear password storage mechanisms. (…) To be vulnerable, an administrator has to be using a poor configuration (cleartext passwords), which already exposes many risks."

A private exploit has been developed by William Brown. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 42 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95893 (Amazon Linux AMI : 389-ds-base (ALAS-2016-773)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236166 (Red Hat Update for 389-ds-base (RHSA-2016:2594)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at pagure.io. A possible mitigation has been published before and not just after the disclosure of the vulnerability. William Brown explains: "The timing attack was due to the use of strcmp to compare the password or hashcontent in the password plugin. This was replaced by a constant time variant to mitigate."

The vulnerability is also documented in the databases at Tenable (95893) and SecurityFocus (BID 93884†). The entries VDB-102138 and VDB-102140 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Password
Class: Information management / Password
CWE: CWE-199 / CWE-200 / CWE-284
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept
Author: William Brown

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95893
Nessus Name: Amazon Linux AMI : 389-ds-base (ALAS-2016-773)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for 389-ds-base CESA-2016:2765 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: pagure.io

Timelineinfo

06/10/2016 🔍
07/21/2016 +41 days 🔍
11/03/2016 +105 days 🔍
12/15/2016 +42 days 🔍
12/16/2016 +1 days 🔍
06/08/2017 +174 days 🔍
06/08/2017 +0 days 🔍
06/09/2017 +1 days 🔍
12/08/2022 +2008 days 🔍

Sourcesinfo

Vendor: redhat.com

Advisory: RHSA-2016:2594
Researcher: William Brown
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5405 (🔍)
GCVE (CVE): GCVE-0-2016-5405
GCVE (VulDB): GCVE-100-102139
SecurityFocus: 93884 - 389 Directory Server CVE-2016-5405 Information Disclosure Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/09/2017 08:00
Updated: 12/08/2022 10:17
Changes: 06/09/2017 08:00 (89), 10/17/2019 09:44 (2), 12/08/2022 10:17 (4)
Complete: 🔍
Cache ID: 216::103

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