CVE-2011-4191

Novell NetWare 6.5 SP8 - Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2011-4191. PoCs published by Francis Provencher.

AI-analyzed exploit summary This exploit targets a stack-based buffer overflow in Novell Netware's xnfs.nlm component via a malformed NLM_TEST RPC request. The PoC sends a crafted UDP packet to port 32779, exploiting the vulnerability to achieve remote code execution without authentication.

Description

Stack-based buffer overflow in the xdrDecodeString function in XNFS.NLM in Novell NetWare 6.5 SP8 allows remote attackers to execute arbitrary code or cause a denial of service (abend or NFS outage) via long packets.

Exploits (3)

exploitdb WORKING POC VERIFIED
by Francis Provencher · textdosnetware
https://www.exploit-db.com/exploits/18351

This exploit targets a stack-based buffer overflow in Novell Netware's xnfs.nlm component via a malformed NLM_TEST RPC request. The PoC sends a crafted UDP packet to port 32779, exploiting the vulnerability to achieve remote code execution without authentication.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Novell Netware 6.5 SP8
No auth needed
Prerequisites: Network access to UDP port 32779 on the target · Vulnerable Novell Netware installation
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Francis Provencher · textdosnetware
https://www.exploit-db.com/exploits/18328

This exploit targets a stack-based buffer overflow in Novell Netware's XNFS.NLM component via a malformed STAT_NOTIFY RPC request. The PoC sends a crafted UDP packet to port 32778, potentially leading to remote code execution without authentication.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Theoretical
Target: Novell Netware 6.5 SP8
No auth needed
Prerequisites: Network access to UDP/TCP port 32778 on the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Francis Provencher · textdosnetware
https://www.exploit-db.com/exploits/18327

This Ruby script exploits a stack-based buffer overflow in Novell Netware's XNFS.NLM NFS RPC service (UDP port 2049) via a malformed NFS_RENAME request. The PoC sends a crafted RPC packet with an oversized filename length to trigger remote code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Novell Netware 6.5 SP8
No auth needed
Prerequisites: Network access to UDP port 2049 on the target · Vulnerable Novell Netware installation
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Issue Tracking x_refsource_confirm
https://bugzilla.novell.com/show_bug.cgi?id=671020
Issue Tracking x_refsource_confirm
https://bugzilla.novell.com/show_bug.cgi?id=702491
Various Sources x_refsource_confirm
http://download.novell.com/Download?buildid=Cfw1tDezgbw~

Scores

EPSS 0.1038
EPSS Percentile 95.1%

Details

CWE
CWE-119
Status published
Products (1)
novell/netware 6.5 sp8
Published Nov 30, 2011
Tracked Since Feb 18, 2026