SUBJECT: CVE-2010-2730 Buffer overflow in (IIS) 7.5
TECH STACK: Microsoft Internet Information Services (IIS) 7.5, when FastCGI is enabled
DATE(S) ISSUED: 09/15/2010
NVD Last Modified: 02/05/2021
CRITICALITY: CRITICAL
OVERVIEW:
CVE-2010-2730 is a buffer overflow vulnerability in Microsoft's Internet Information Services (IIS) 7.5 when the FastCGI module is enabled. This vulnerability can lead to a situation where an attacker can execute arbitrary code by sending specially crafted headers in a request.
Details:
The vulnerability is located in the FastCGI module of IIS 7.5. FastCGI is a protocol for interfacing interactive programs with a web server, and is commonly used for executing scripts on a server.
The problem arises when the FastCGI module improperly handles specially crafted HTTP requests. If an attacker sends a request with specifically crafted headers, it can lead to a buffer overflow condition. This condition can allow an attacker to execute arbitrary code in the context of the application, potentially gaining control over the affected system.
Impact:
An attacker who successfully exploits this vulnerability could take control of an affected system. They can then install programs; view, change, or delete data; or create new accounts with full user rights.
SOLUTION:
To mitigate the risk associated with CVE-2010-2730, the following high-level steps should be taken:
1. Apply Patches and Updates: Microsoft has released a security update to address this vulnerability. It's recommended to apply the appropriate patches or updates provided by Microsoft. If automatic updates are enabled on your system, these patches should be applied automatically. If not, manual update may be necessary.
2. Enable FastCGI Only When Necessary: As the vulnerability is specific to the FastCGI module, consider disabling this module when it's not necessary for your system's operation. This can limit the potential attack surface.
3. Limit Network Access: Where possible, limit the exposure of the IIS server to the internet. Only allow trusted networks and users to access your IIS server. This reduces the likelihood of an attacker reaching your server.
4. Regularly Monitor and Audit your System: Regularly monitor your system and network logs for any suspicious activities. Implement an intrusion detection system (IDS) if possible.
5. Least Privilege Principle: Run services and applications with the least privileges they need to function correctly. This can limit the potential impact if an attacker exploits this vulnerability.
6. Backup and Disaster Recovery Plan: Maintain regular backups of your system and ensure that your disaster recovery plan is up to date. This can aid in recovery if your system is compromised.
REFERENCES:
Microsoft Security Bulletin MS10-065: This is the official security update from Microsoft regarding the vulnerability. You can access it here
OVAL Repository: OVAL (Open Vulnerability and Assessment Language) is a community effort to standardize how to assess and report upon the machine state of computer systems. The specific link to the OVAL definition for this vulnerability is here