CVE-2009-3641

Snort < 2.8.5.1 - Denial of Service via Crafted IPv6 Packet

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2009-3641. PoCs published by laurent gaffie.

AI-analyzed exploit summary The exploit demonstrates a remote DoS vulnerability in Snort <= 2.8.5 when parsing specially crafted IPv6 packets. It includes two Python scripts using Scapy to trigger crashes via malformed TCP or ICMPv6 packets.

Description

Snort before 2.8.5.1, when the -v option is enabled, allows remote attackers to cause a denial of service (application crash) via a crafted IPv6 packet that uses the (1) TCP or (2) ICMP protocol.

Exploits (2)

exploitdb WORKING POC VERIFIED
by laurent gaffie · textdosmultiple
https://www.exploit-db.com/exploits/9969

The exploit demonstrates a remote DoS vulnerability in Snort <= 2.8.5 when parsing specially crafted IPv6 packets. It includes two Python scripts using Scapy to trigger crashes via malformed TCP or ICMPv6 packets.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Snort <= 2.8.5
No auth needed
Prerequisites: Snort compiled with --enable-ipv6 · Snort running in verbose mode (-v) · Network access to target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by laurent gaffie · textdoslinux
https://www.exploit-db.com/exploits/33306

The exploit demonstrates two denial-of-service vulnerabilities in Snort 2.8.5 by sending malformed IPv6 packets using Scapy. The first PoC targets x86 systems with a crafted TCP payload, while the second affects both x86 and x64 systems via an ICMPv6 packet with an oversized payload.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Snort 2.8.5
No auth needed
Prerequisites: Scapy library · Network access to target · Target IPv6 address
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (12)

Core 12
Core References
Exploit, Patch vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/36795
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2009/3014
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/53912
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/59159
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1023076
Vendor Advisory x_refsource_confirm
http://dl.snort.org/snort-current/release_notes_2851.txt
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/37135
Mailing List mailing-list x_refsource_mlist
http://marc.info/?l=oss-security&m=125649553414700&w=2
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2009/10/25/5
Exploit, Patch mailing-list x_refsource_fulldisc
http://seclists.org/fulldisclosure/2009/Oct/299

Scores

EPSS 0.3878
EPSS Percentile 98.4%

Details

Status published
Products (25)
snort/snort 1.6
snort/snort 1.8.0
snort/snort 1.8.1
snort/snort 1.8.2
snort/snort 1.8.3
snort/snort 1.8.4
snort/snort 1.8.5
snort/snort 1.8.6
snort/snort 1.8.7
snort/snort 1.9.0
... and 15 more
Published Oct 28, 2009
Tracked Since Feb 18, 2026