Microsoft Internet Explorer 6/7/8 input validation

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.
5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Internet Explorer 6/7/8 and classified as critical. The impacted element is an unknown function. Such manipulation leads to input validation. This vulnerability is referenced as CVE-2011-1999. It is possible to launch the attack remotely. Furthermore, an exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 6/7/8 (Web Browser) and classified as critical. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Microsoft Internet Explorer 8 does not properly allocate and access memory, which allows remote attackers to execute arbitrary code via vectors involving a "dereferenced memory address," aka "Select Element Remote Code Execution Vulnerability."

The issue has been introduced in 03/05/2008. The weakness was published 10/11/2011 as MS11-081 as confirmed bulletin (Technet). The advisory is shared for download at technet.microsoft.com. This vulnerability is handled as CVE-2011-1999. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1315 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 56455 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 100111 (Microsoft Internet Explorer Cumulative Security Update (MS11-081)).

Applying the patch MS11-081 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11725.

The vulnerability is also documented in the databases at X-Force (70130), Exploit-DB (36209), Tenable (56455), SecurityFocus (BID 49964†) and Vulnerability Center (SBV-33527†). Similar entries are available at VDB-4423, VDB-59002, VDB-59001 and VDB-58999. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 56455
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 901208
OpenVAS Name: Microsoft Internet Explorer Multiple Vulnerabilities (2586448)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS11-081
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

03/05/2008 🔍
05/09/2011 +1159 days 🔍
10/11/2011 +155 days 🔍
10/11/2011 +0 days 🔍
10/11/2011 +0 days 🔍
10/12/2011 +1 days 🔍
03/23/2015 +1258 days 🔍
06/07/2025 +3729 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS11-081
Status: Confirmed

CVE: CVE-2011-1999 (🔍)
GCVE (CVE): GCVE-0-2011-1999
GCVE (VulDB): GCVE-100-59000

OVAL: 🔍

X-Force: 70130
SecurityFocus: 49964
Vulnerability Center: 33527 - [MS11-081] Microsoft Internet Explorer 8 Select Element Remote Code Execution Vulnerability, Medium

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

Entryinfo

Created: 03/23/2015 16:50
Updated: 06/07/2025 16:09
Changes: 03/23/2015 16:50 (46), 04/07/2017 12:10 (23), 11/23/2021 15:45 (2), 11/23/2021 15:51 (7), 11/23/2021 15:57 (1), 06/07/2025 16:09 (23)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!