Title: Microsoft IIS Device File Local DoS Vulnerability
Severity: LOW
Description:
Microsoft IIS is prone to denial of service attacks by local users.
This issue is exploitable if the local attacker can create an .asp file which attempts to perform file I/O on various devices names.
When a script uses the 'Scripting.FileSystemObject' methods to open and read from a 'dos device', the ASP interpreter will hang. This will result in a denial of service.
This issue is exploitable if the local attacker can create an .asp file which triggers the condition. A user on a webhosting service may for example use this vulnerability to cause a denial of service to other websites hosted by the vulnerable server.
This vulnerability may also be exploitable by remote attackers if existing scripts use the 'Scripting.FileSystemObject' methods to open files with filenames supplied remotely. If attackers can cause the target script to open/read from a 'device name', the denial of service will be triggered.
The end result of exploiting this vulnerability is that the server will crash and a denial of services will occur. The affected services must be restarted to regain normal functionality.
Affected Products:
- Cisco Building Broadband Service Manager 5.0.0
- Cisco Call Manager 1.0.0
- Cisco Call Manager 2.0.0
- Cisco Call Manager 3.0.0
- Cisco ICS 7750
- Cisco IP/VC 3540 Video Rate Matching Module
- Cisco Unity Server 2.0.0
- Cisco Unity Server 2.2.0
- Cisco Unity Server 2.3.0
- Cisco Unity Server 2.4.0
- Cisco uOne 1.0.0
- Cisco uOne 2.0.0
- Cisco uOne 3.0.0
- Cisco uOne 4.0.0
- Microsoft BackOffice 4.0
- Microsoft BackOffice 4.5
- Microsoft IIS 4.0
- Microsoft IIS 5.0
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Server
- Microsoft Windows NT 4.0 Option Pack
References:
- Microsoft: Microsoft Internet Information Server 4.0 Security Checklist
- Microsoft: Secure Internet Information Services 5 Checklist
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