CVE-2007-1398

Snort 2.6.1.1 2.6.1.2 2.7.0 beta - Denial of Service via UDP Packet Handling in frag3 Preprocessor

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2007-1398. PoCs published by Antimatt3r.

AI-analyzed exploit summary This exploit triggers a denial-of-service (DoS) in Snort Inline by sending fragmented UDP packets with overlapping offsets, causing a segmentation fault during reassembly. It requires specific conditions like Frag3 enabled, inline mode, and disabled ip_conntrack.

Description

The frag3 preprocessor in Snort 2.6.1.1, 2.6.1.2, and 2.7.0 beta, when configured for inline use on Linux without the ip_conntrack module loaded, allows remote attackers to cause a denial of service (segmentation fault and application crash) via certain UDP packets produced by send_morefrag_packet and send_overlap_packet.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Antimatt3r · cdosmultiple
https://www.exploit-db.com/exploits/3434

This exploit triggers a denial-of-service (DoS) in Snort Inline by sending fragmented UDP packets with overlapping offsets, causing a segmentation fault during reassembly. It requires specific conditions like Frag3 enabled, inline mode, and disabled ip_conntrack.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Snort Inline versions 2.6.1.1, 2.6.1.2, 2.7.0 (beta)
No auth needed
Prerequisites: Frag3 enabled · Inline mode · Linux environment · ip_conntrack disabled
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/33024
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/3434
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/22872

Scores

EPSS 0.0557
EPSS Percentile 91.9%

Details

Status published
Products (3)
snort/snort 2.6.1.1
snort/snort 2.6.1.2
snort/snort 2.7_beta1
Published Mar 10, 2007
Tracked Since Feb 18, 2026