CVE-2012-3549

FreeBSD 8.2 - Denial of Service via Crafted ASCONF Chunk

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2012-3549. PoCs published by Shaun Colley.

AI-analyzed exploit summary This exploit triggers a remote NULL pointer dereference in the FreeBSD kernel's SCTP implementation by sending a malformed ASCONF chunk, causing a denial-of-service (DoS) condition. The vulnerability arises from improper handling of invalid vtags in the `sctp_findassoc_by_vtag` function.

Description

The SCTP implementation in FreeBSD 8.2 allows remote attackers to cause a denial of service (NULL pointer dereference and kernel panic) via a crafted ASCONF chunk.

Exploits (1)

exploitdb WORKING POC
by Shaun Colley · cdosfreebsd
https://www.exploit-db.com/exploits/20226

This exploit triggers a remote NULL pointer dereference in the FreeBSD kernel's SCTP implementation by sending a malformed ASCONF chunk, causing a denial-of-service (DoS) condition. The vulnerability arises from improper handling of invalid vtags in the `sctp_findassoc_by_vtag` function.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: FreeBSD kernel SCTP implementation (tested on FreeBSD 8.2-RELEASE, latest release also vulnerable)
No auth needed
Prerequisites: Target system must have an open SCTP port
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/54797
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/28/9
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/08/29/6
Exploit exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/20226

Scores

EPSS 0.0781
EPSS Percentile 93.9%

Details

Status published
Products (1)
freebsd/freebsd 8.2
Published Oct 09, 2012
Tracked Since Feb 18, 2026