Microsoft NET Framework Null Byte information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft NET Framework and classified as problematic. This affects an unknown part of the component Null Byte Handler. This manipulation causes information disclosure. This vulnerability is handled as CVE-2007-0042. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Microsoft NET Framework (the affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown part of the component Null Byte Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

Interpretation conflict in ASP.NET in Microsoft .NET Framework 1.0, 1.1, and 2.0 for Windows 2000, XP, Server 2003, and Vista allows remote attackers to access configuration files and obtain sensitive information, and possibly bypass security mechanisms that try to constrain the final substring of a string, via %00 characters, related to use of %00 as a string terminator within POSIX functions but a data character within .NET strings, aka "Null Byte Termination Vulnerability."

The bug was discovered 07/10/2007. The weakness was released 07/10/2007 by Jeroen Frijters (Paul) with Microsoft as MS07-039 as confirmed bulletin (Technet). The advisory is shared at microsoft.com. This vulnerability is known as CVE-2007-0042 since 01/03/2007. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 25700 (MS07-040: Vulnerabilities in .NET Framework Could Allow Remote Code Execution (931212) (uncredentialed check)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90401 (Microsoft .NET Framework Remote Code Execution Vulnerabilities (MS07-040)).

Upgrading eliminates this vulnerability. Applying the patch MS07-039 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 4723.

The vulnerability is also documented in the databases at X-Force (34638), Tenable (25700), SecurityFocus (BID 24791†), OSVDB (35955†) and Secunia (SA26003†). Entries connected to this vulnerability are available at VDB-3180, VDB-3182, VDB-3178 and VDB-3179. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.8
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 25700
Nessus Name: MS07-040: Vulnerabilities in .NET Framework Could Allow Remote Code Execution (931212) (uncredentialed check)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 101005
OpenVAS Name: Microsoft Security Bulletin MS07-040
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Patch: MS07-039
TippingPoint: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

01/03/2007 🔍
07/06/2007 +184 days 🔍
07/06/2007 +0 days 🔍
07/10/2007 +4 days 🔍
07/10/2007 +0 days 🔍
07/10/2007 +0 days 🔍
07/10/2007 +0 days 🔍
07/10/2007 +0 days 🔍
07/10/2007 +0 days 🔍
07/10/2007 +0 days 🔍
07/11/2007 +0 days 🔍
07/11/2007 +0 days 🔍
07/18/2007 +7 days 🔍
07/21/2019 +4386 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS07-039
Researcher: Jeroen Frijters (Paul)
Organization: Microsoft
Status: Confirmed

CVE: CVE-2007-0042 (🔍)
GCVE (CVE): GCVE-0-2007-0042
GCVE (VulDB): GCVE-100-3181

OVAL: 🔍
IAVM: 🔍

X-Force: 34638
SecurityFocus: 24791 - Microsoft .Net Framework Multiple Null Byte Injection Vulnerabilities
Secunia: 26003
OSVDB: 35955 - Microsoft .NET Framework NULL Byte URL Arbitrary File Access
SecurityTracker: 1018356
Vulnerability Center: 15590 - [MS07-040] .NET Framework ASP.NET Remote Disclosure of Configuration Files via \, Medium
Vupen: ADV-2007-2482

See also: 🔍

Entryinfo

Created: 07/18/2007 16:23
Updated: 07/21/2019 16:53
Changes: 07/18/2007 16:23 (100), 07/21/2019 16:53 (4)
Complete: 🔍
Cache ID: 216:D38:103

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