Microsoft ASP.NET 2.0 AutoPostBack cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft ASP.NET 2.0 and classified as critical. This affects an unknown function. This manipulation of the argument AutoPostBack causes cross site scripting. This vulnerability appears as CVE-2006-3436. The attack may be initiated remotely. In addition, an exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical was found in Microsoft ASP.NET 2.0. Affected by this vulnerability is an unknown part. The manipulation of the argument AutoPostBack with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Cross-site scripting (XSS) vulnerability in Microsoft .NET Framework 2.0 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors involving "ASP.NET controls that set the AutoPostBack property to true".

The weakness was presented 10/10/2006 by Jaswinder Hayre as MS06-056 as confirmed bulletin (Technet). The advisory is shared at microsoft.com. This vulnerability is known as CVE-2006-3436 since 07/07/2006. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details and also a exploit are known. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

It is declared as highly functional. The vulnerability scanner Nessus provides a plugin with the ID 22529 (MS06-056: Vulnerabilities in ASP.NET could allow information disclosure (922770)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90357 (Microsoft ASP.NET 2.0 Information Disclosure Vulnerability (MS06-056)).

Applying the patch MS06-056 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 8700. In this case the pattern __LASTFOCUS= is used for detection.

The vulnerability is also documented in the databases at X-Force (28658), Tenable (22529), SecurityFocus (BID 20337†), OSVDB (29431†) and Secunia (SA22307†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-80 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 22529
Nessus Name: MS06-056: Vulnerabilities in ASP.NET could allow information disclosure (922770)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 101006
OpenVAS Name: Microsoft Security Bulletin MS06-056
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: MS06-056

Snort ID: 8700
Snort Message: WEB-IIS ASP.NET 2.0 cross-site scripting attempt
Snort Pattern: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍

Timelineinfo

07/07/2006 🔍
10/10/2006 +95 days 🔍
10/10/2006 +0 days 🔍
10/10/2006 +0 days 🔍
10/10/2006 +0 days 🔍
10/10/2006 +0 days 🔍
10/10/2006 +0 days 🔍
10/10/2006 +0 days 🔍
10/10/2006 +0 days 🔍
10/11/2006 +0 days 🔍
10/11/2006 +0 days 🔍
04/24/2026 +7135 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS06-056
Researcher: Jaswinder Hayre
Status: Confirmed

CVE: CVE-2006-3436 (🔍)
GCVE (CVE): GCVE-0-2006-3436
GCVE (VulDB): GCVE-100-2593

OVAL: 🔍

CERT: 🔍
X-Force: 28658 - Microsoft ASP.NET Framework HTTP cross-site scripting, Medium Risk
SecurityFocus: 20337 - Microsoft ASP.NET AutoPostBack Variable Cross-Site Scripting Vulnerability
Secunia: 22307 - Microsoft .NET Framework Cross-Site Scripting Vulnerability, Less Critical
OSVDB: 29431 - Microsoft .NET Framework AutoPostBack Property Unspecified XSS
SecurityTracker: 1017029
Vulnerability Center: 12874 - [MS06-056] Microsoft .NET Framework 2.0 AutoPostBack XSS Vulnerability, Medium
Vupen: ADV-2006-3976

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

Entryinfo

Created: 10/11/2006 10:36
Updated: 04/24/2026 02:44
Changes: 10/11/2006 10:36 (95), 07/09/2019 09:15 (11), 01/20/2025 23:41 (17), 04/22/2025 19:55 (2), 06/21/2025 17:50 (2), 04/24/2026 02:44 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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