VDB-91867 · CVE-2016-5247 · BID 92661

Lenovo ThinkCentre/ThinkServer/ThinkStation BIOS Secure Boot 7pk security

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.
7.8$0-$5k0.00

A vulnerability has been found in Lenovo ThinkCentre, ThinkServer and ThinkStation (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component BIOS. The manipulation with an unknown input leads to a 7pk security vulnerability (Secure Boot). The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The BIOS for Lenovo ThinkCentre E93, M6500t/s, M6600, M6600q, M6600t/s, M73p, M800, M83, M8500t/s, M8600t/s, M900, M93, and M93P devices; ThinkServer RQ940, RS140, TS140, TS240, TS440, and TS540 devices; and ThinkStation E32, P300, and P310 devices might allow local users or physically proximate attackers to bypass the Secure Boot protection mechanism by leveraging an AMI test key.

The weakness was disclosed 09/22/2016 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2016-5247. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1211 according to MITRE ATT&CK.

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

Productinfo

Vendor

Name

License

  • commercial

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.8
VulDB Temp Score: 7.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Secure Boot
Class: 7pk security / Secure Boot
CWE: CWE-254
ATT&CK: T1211

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/03/2016 🔍
08/25/2016 +83 days 🔍
09/22/2016 +28 days 🔍
09/22/2016 +0 days 🔍
09/23/2016 +1 days 🔍
09/19/2022 +2187 days 🔍

Sourcesinfo

Vendor: lenovo.com

Advisory: securityfocus.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5247 (🔍)
SecurityFocus: 92661 - Lenovo Secure Boot CVE-2016-5247 Local Security Bypass Vulnerability

Entryinfo

Created: 09/23/2016 09:23 AM
Updated: 09/19/2022 07:20 PM
Changes: 09/23/2016 09:23 AM (49), 04/23/2019 11:14 PM (11), 09/19/2022 07:20 PM (2)
Complete: 🔍

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!