CVE-2003-0864

IRCnet IRCD 2.10.x-2.10.3p3 - Denial of Service via m_join Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2003-0864. PoCs published by millhouse.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in IRCnet IRCD (2.10.3p3 and below) by sending a maliciously crafted JOIN command, leading to a denial-of-service (DoS) condition. The exploit leverages a strcat() overflow in channel.c, though the author notes that arbitrary code execution is not feasible due to lack of EIP control.

Description

Buffer overflow in m_join in channel.c for IRCnet IRCD 2.10.x to 2.10.3p3 allows remote attackers to cause a denial of service.

Exploits (1)

exploitdb WORKING POC VERIFIED
by millhouse · cdoslinux
https://www.exploit-db.com/exploits/23239

This exploit targets a buffer overflow vulnerability in IRCnet IRCD (2.10.3p3 and below) by sending a maliciously crafted JOIN command, leading to a denial-of-service (DoS) condition. The exploit leverages a strcat() overflow in channel.c, though the author notes that arbitrary code execution is not feasible due to lack of EIP control.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: IRCnet IRCD 2.10.3p3 and below
No auth needed
Prerequisites: Network access to the target IRC server · The attacker's IP must match a server's I-Line configuration
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/8817
Vendor Advisory vendor-advisory x_refsource_conectiva
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000765
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=106667431021928&w=2
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/13408
Various Sources x_refsource_confirm
ftp://ftp.irc.org/irc/server/ChangeLog
Mailing List mailing-list x_refsource_bugtraq
http://marc.info/?l=bugtraq&m=106606129601446&w=2

Scores

EPSS 0.0410
EPSS Percentile 89.5%

Details

Status published
Products (2)
ircnet/ircnet_ircd 2.10
ircnet/ircnet_ircd 2.10.3_p3
Published Nov 17, 2003
Tracked Since Feb 18, 2026