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.
4.5	$0-$5k	0.00

A vulnerability classified as problematic has been found in Microsoft Windows (Operating System) (affected version not known). This affects the function IsHandleEntrySecure. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

** DISPUTED ** The IsHandleEntrySecure function in win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2008 SP2 does not properly validate the tagPROCESSINFO pW32Job field, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted NtUserValidateHandleSecure call for an owned object. NOTE: the vendor reportedly disputes the significance of this report, stating that "it appears to be a local DOS ... we don t consider it a security vulnerability."

The weakness was published 12/06/2013 by sixtyvividtails (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2013-6999 since 12/06/2013. The exploitability is told to be difficult. Attacking locally is a requirement. A authentication is required for exploitation. Technical details and a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/11/2022).

It is declared as proof-of-concept. The real existence of this vulnerability is still doubted at the moment.

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

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

License

• commercial

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept

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

12/03/2013 🔍
12/03/2013 +0 days 🔍
12/06/2013 +3 days 🔍
12/06/2013 +0 days 🔍
12/06/2013 +0 days 🔍
03/24/2015 +473 days 🔍
01/11/2022 +2485 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: securityfocus.com⛔
Researcher: sixtyvividtails
Status: Not defined
Disputed: 🔍

CVE: CVE-2013-6999 (🔍)
SecurityFocus: 64057 - Microsoft Windows Kernel 'IsHandleEntrySecure()' Function Local Denial of Service Vulnerability
Secunia: 55633 - Microsoft Windows "IsHandleEntrySecure()" Denial of Service Vulnerability, Not Critical

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

Entryinfo

Created: 03/24/2015 15:54
Updated: 01/11/2022 08:47
Changes: 03/24/2015 15:54 (43), 04/07/2017 16:05 (9), 01/11/2022 08:47 (7)
Complete: 🔍

Discussion

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!