CVE-2011-1965

Microsoft Windows 7 Gold & SP1/Windows Server 2008 R2 & R2 SP1 - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2011-1965. PoCs published by Byoungyoung Lee.

AI-analyzed exploit summary This exploit targets CVE-2011-1965, a denial-of-service vulnerability in the Windows TCP/IP stack. It sends a malformed HTTP request with an overly long filename to trigger a kernel crash on Windows 7 32-bit systems.

Description

Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and R2 SP1 does not properly implement URL-based QoS, which allows remote attackers to cause a denial of service (reboot) via a crafted URL to a web server, aka "TCP/IP QOS Denial of Service Vulnerability."

Exploits (1)

exploitdb WORKING POC
by Byoungyoung Lee · pythondoswindows
https://www.exploit-db.com/exploits/17981

This exploit targets CVE-2011-1965, a denial-of-service vulnerability in the Windows TCP/IP stack. It sends a malformed HTTP request with an overly long filename to trigger a kernel crash on Windows 7 32-bit systems.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Windows 7 32-bit (fully patched until Aug 2011)
No auth needed
Prerequisites: Network access to the target system · Target system running a vulnerable version of Windows 7 32-bit
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/8474
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12318
US Government Resource third-party-advisory x_refsource_cert
http://www.us-cert.gov/cas/techalerts/TA11-221A.html

Scores

EPSS 0.2493
EPSS Percentile 97.6%

Details

CWE
CWE-399
Status published
Products (2)
microsoft/windows_7 (3 CPE variants)
microsoft/windows_server_2008 r2 (2 CPE variants)
Published Aug 10, 2011
Tracked Since Feb 18, 2026