Authconfig 6.2.8 SSSD Authentication Username information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Authconfig 6.2.8. This affects an unknown function of the component SSSD Authentication. Executing a manipulation can lead to information disclosure (Username). This vulnerability appears as CVE-2017-7488. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Authconfig 6.2.8. It has been declared as problematic. This vulnerability affects an unknown code block of the component SSSD Authentication. The manipulation with an unknown input leads to a information disclosure vulnerability (Username). The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Authconfig version 6.2.8 is vulnerable to an Information exposure while using SSSD to authenticate against remote server resulting in the leak of information about existing usernames.

The bug was discovered 04/12/2017. The weakness was presented 05/16/2017 with Red Hat as Bug 1441604 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2017-7488 since 04/05/2017. The exploitation appears to be easy. The attack can be initiated remotely. The requirement for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability was handled as a non-public zero-day exploit for at least 34 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102758 (CentOS 7 : authconfig (CESA-2017:2285)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 256254 (CentOS Security Update for authconfig (CESA-2017:2285)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (102758) and SecurityFocus (BID 101784†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Username
Class: Information disclosure / Username
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 102758
Nessus Name: CentOS 7 : authconfig (CESA-2017:2285)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871165
OpenVAS Name: RedHat Update for authconfig RHSA-2017:2285-01
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

04/05/2017 🔍
04/12/2017 +7 days 🔍
05/16/2017 +34 days 🔍
05/16/2017 +0 days 🔍
05/16/2017 +0 days 🔍
05/17/2017 +1 days 🔍
08/23/2017 +98 days 🔍
08/25/2017 +2 days 🔍
12/24/2020 +1217 days 🔍

Sourcesinfo

Advisory: Bug 1441604
Researcher: Tomas Mraz (Red Hat), Thorsten Scherf (Red Hat).
Organization: Red Hat
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-7488 (🔍)
GCVE (CVE): GCVE-0-2017-7488
GCVE (VulDB): GCVE-100-101428
SecurityFocus: 101784 - Authconfig CVE-2017-7488 Information Disclosure Vulnerability
OSVDB: - CVE-2017-7488 - Authconfig - Information Disclosure Issue

Entryinfo

Created: 05/17/2017 08:03
Updated: 12/24/2020 15:38
Changes: 05/17/2017 08:03 (75), 09/29/2020 12:46 (8), 12/24/2020 15:38 (2)
Complete: 🔍
Cache ID: 216::103

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