CVE-2001-0506

Internet Information Server 4.0-5.0 - Local Privilege Escalation via SSI Long Filename Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2001-0506. PoCs published by Indigo.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in Microsoft IIS 4.0 and 5.0 via Server Side Include (SSI) files. It generates a malicious SSI file that, when accessed, triggers a buffer overflow to execute arbitrary shellcode, providing a SYSTEM-level reverse shell to the attacker.

Description

Buffer overflow in ssinc.dll in IIS 5.0 and 4.0 allows local users to gain system privileges via a Server-Side Includes (SSI) directive for a long filename, which triggers the overflow when the directory name is added, aka the "SSI privilege elevation" vulnerability.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Indigo · clocalwindows
https://www.exploit-db.com/exploits/21071

This exploit targets a buffer overflow vulnerability in Microsoft IIS 4.0 and 5.0 via Server Side Include (SSI) files. It generates a malicious SSI file that, when accessed, triggers a buffer overflow to execute arbitrary shellcode, providing a SYSTEM-level reverse shell to the attacker.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft IIS 4.0 and 5.0
Auth required
Prerequisites: Write access to the web root directory of the target IIS server · Ability to place a file in a directory with a 12-character name
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://online.securityfocus.com/archive/1/242541
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=99802093532233&w=2
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/3190
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/6984
Third Party Advisory, US Government Resource third-party-advisory government-resource x_refsource_ciac
http://www.ciac.org/ciac/bulletins/l-132.shtml

Scores

EPSS 0.6893
EPSS Percentile 99.3%

Details

Status published
Products (2)
microsoft/internet_information_server 4.0
microsoft/internet_information_services 5.0
Published Sep 20, 2001
Tracked Since Feb 18, 2026