Title: NT IIS4 Buffer Overflow Vulnerability
Severity: CRITICAL
Description:
Microsoft IIS (Internet Information Services) provides support for several file types that require server side processing.
A buffer overflow vulnerability has been reported in the filter dynamic linked libraries that are employed to process several server-side file types, for example .HTR, .STM and .IDC files.
An attacker may exploit this vulnerability by making a malicious HTTP request for one of the affected file types. The malicious request will be handled by the affected filter DLL and ultimately, an internal buffer in memory may be overrun. Data contained adjacent to the affected buffer will be corrupted with attacker-supplied data. As this memory space contains values that are crucial to controlling program execution flow, it has been reported that a skilled attacker may exploit this vulnerability to execute arbitrary code. Code execution will occur in the context of the affected IIS server. It should be noted that this issue might also be exploited to deny service to the affected server.
It should be noted that the affected DLL's are installed by default with IIS.
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 0.0.0
- Cisco IP/VC 3540 Video Rate Matching Module 0.0.0
- 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 4.0.0
- Microsoft BackOffice 4.5.0
- Microsoft IIS 4.0.0
- Microsoft Windows NT 4.0 Option Pack
References:
- Metasploit: Metasploit Framework Exploits
- Microsoft: Microsoft Security Advisor Program: Microsoft Security Bulletin (MS99-019)
- Microsoft: Q234905: An Improperly Formatted HTTP Request Can Cause The Inetinfo Process To
- eEye: eEye Digital Security Team Home Page
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