Microsoft ASP.NET Forms Authentication path traversal

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.
9.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Microsoft ASP.NET. This affects an unknown function of the component Forms Authentication. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2004-0847. The attack can be initiated remotely. Additionally, an exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft ASP.NET (version now known). It has been classified as critical. This affects some unknown processing of the component Forms Authentication. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The Microsoft .NET forms authentication capability for ASP.NET allows remote attackers to bypass authentication for .aspx files in restricted directories via a request containing a (1) "\" (backslash) or (2) "%5C" (encoded backslash), aka "Path Validation Vulnerability."

The weakness was released 11/03/2004 (Website). It is possible to read the advisory at us-cert.gov. This vulnerability is uniquely identified as CVE-2004-0847 since 09/08/2004. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 16333 (MS05-004: ASP.NET Path Validation Vulnerability (887219)), 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 90220 (Microsoft ASP.NET Path Validation Vulnerability (MS05-004)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published 4 months after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 3258.

The vulnerability is also documented in the databases at X-Force (18769), Tenable (16333), SecurityFocus (BID 11342†) and Vulnerability Center (SBV-5822†). Entries connected to this vulnerability are available at VDB-21548 and VDB-24284. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.3

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
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: 16333
Nessus Name: MS05-004: ASP.NET Path Validation Vulnerability (887219)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 101010
OpenVAS Name: Microsoft Security Bulletin MS05-004
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Suricata ID: 2001342
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

09/08/2004 🔍
10/06/2004 +28 days 🔍
10/06/2004 +0 days 🔍
11/03/2004 +28 days 🔍
11/03/2004 +0 days 🔍
11/21/2004 +18 days 🔍
02/08/2005 +79 days 🔍
02/09/2005 +1 days 🔍
01/09/2015 +3621 days 🔍
07/07/2025 +3832 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: us-cert.gov
Status: Confirmed

CVE: CVE-2004-0847 (🔍)
GCVE (CVE): GCVE-0-2004-0847
GCVE (VulDB): GCVE-100-22371

OVAL: 🔍

CERT: 🔍
X-Force: 18769
SecurityFocus: 11342 - Microsoft ASP.NET URI Canonicalization Unauthorized Web Access Vulnerability
Vulnerability Center: 5822 - [MS05-004] Microsoft .NET Framework Authentication Bypass for .aspx Files, High

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

Entryinfo

Created: 01/09/2015 16:21
Updated: 07/07/2025 15:23
Changes: 01/09/2015 16:21 (78), 05/25/2019 20:31 (12), 06/30/2021 12:58 (3), 07/31/2024 16:41 (23), 01/02/2025 18:40 (3), 07/07/2025 15:23 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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!