AT&T U-verse up to 9.2.2h0d83 on NVG589/NVG599 IP Passthrough Mode username:password access control

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in AT&T U-verse up to 9.2.2h0d83 on NVG589/NVG599. This impacts an unknown function of the component IP Passthrough Mode. This manipulation of the argument username:password with the input remotessh:5SaP9I26 causes access control. This vulnerability appears as CVE-2017-14115. The attack may be initiated remotely. There is no available exploit. It is advisable to implement restrictive firewalling.

Detailsinfo

A vulnerability classified as critical was found in AT&T U-verse up to 9.2.2h0d83 on NVG589/NVG599. Affected by this vulnerability is an unknown functionality of the component IP Passthrough Mode. The manipulation of the argument username:password with the input value remotessh:5SaP9I26 leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The AT&T U-verse 9.2.2h0d83 firmware for the Arris NVG589 and NVG599 devices, when IP Passthrough mode is not used, configures ssh-permanent-enable WAN SSH logins to the remotessh account with the 5SaP9I26 password, which allows remote attackers to access a "Terminal shell v1.0" service, and subsequently obtain unrestricted root privileges, by establishing an SSH session and then entering certain shell metacharacters and BusyBox commands.

The bug was discovered 08/31/2017. The weakness was presented 09/03/2017 (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2017-14115 since 09/03/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 102915 (Default Password '5SaP9I26' for 'remotessh' Account), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Default Unix Accounts and running in the context r.

Proper firewalling of ssh is able to address this issue.

The vulnerability is also documented in the databases at Tenable (102915) and SecurityFocus (BID 100585†). See VDB-106092, VDB-106094 and VDB-106095 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
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

Class: Access control
CWE: 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: 102915
Nessus Name: Default Password '5SaP9I26' for 'remotessh' Account
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Timelineinfo

08/31/2017 🔍
08/31/2017 +0 days 🔍
09/01/2017 +1 days 🔍
09/03/2017 +2 days 🔍
09/03/2017 +0 days 🔍
09/03/2017 +0 days 🔍
09/04/2017 +1 days 🔍
01/10/2021 +1224 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Nomotion
Status: Not defined

CVE: CVE-2017-14115 (🔍)
GCVE (CVE): GCVE-0-2017-14115
GCVE (VulDB): GCVE-100-106093
SecurityFocus: 100585 - AT&T U-verse Arris Modems Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 09/04/2017 09:02
Updated: 01/10/2021 16:06
Changes: 09/04/2017 09:02 (72), 12/29/2019 17:01 (3), 01/10/2021 16:06 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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