VDB-109976 · CVE-2017-16957 · BID 101968

TP-LINK TL-WVR/TL-WAR/TL-ER/TL-R uhttpd diagnostic.lua zone_get_effect_devices iface command injection

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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	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.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in TP-LINK TL-WVR, TL-WAR, TL-ER and TL-R. It has been declared as critical. This impacts the function zone_get_effect_devices in the library /usr/lib/lua/luci/controller/admin/diagnostic.lua of the component uhttpd. Such manipulation of the argument iface leads to command injection. This vulnerability is documented as CVE-2017-16957. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in TP-LINK TL-WVR, TL-WAR, TL-ER and TL-R (Router Operating System) (version now known) and classified as critical. Affected by this issue is the function zone_get_effect_devices in the library /usr/lib/lua/luci/controller/admin/diagnostic.lua of the component uhttpd. The manipulation of the argument iface with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

TP-Link TL-WVR, TL-WAR, TL-ER, and TL-R devices allow remote authenticated users to execute arbitrary commands via shell metacharacters in the iface field of an admin/diagnostic command to cgi-bin/luci, related to the zone_get_effect_devices function in /usr/lib/lua/luci/controller/admin/diagnostic.lua in uhttpd.

The bug was discovered 11/27/2017. The weakness was released 11/27/2017 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2017-16957 since 11/27/2017. The attack may be launched remotely. Required for exploitation is a simple authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 101968†). Entries connected to this vulnerability are available at VDB-109979, VDB-109978 and VDB-109977. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Router Operating System

Vendor

TP-LINK

Name

License

commercial

Website

Vendor: https://www.tp-link.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/27/2017 🔍
11/27/2017 +0 days 🔍
11/27/2017 +0 days 🔍
11/27/2017 +0 days 🔍
11/27/2017 +0 days 🔍
11/27/2017 +0 days 🔍
12/10/2019 +743 days 🔍

Sourcesinfo

Vendor: tp-link.com

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2017-16957 (🔍)
GCVE (CVE): GCVE-0-2017-16957
GCVE (VulDB): GCVE-100-109976
SecurityFocus: 101968 - Multiple TP-Link Routers CVE-2017-16957 Command Injection Vulnerability

See also: 🔍

Entryinfo

Created: 11/27/2017 16:21
Updated: 12/10/2019 16:43
Changes: 11/27/2017 16:21 (61), 12/10/2019 16:43 (3)
Complete: 🔍
Cache ID: 216::103

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