Executive Summary

Summary
Title UnrealIRCd: Multiple vulnerabilities
Informations
Name GLSA-201006-21 First vendor Publication 2010-06-14
Vendor Gentoo Last vendor Modification 2010-06-14
Severity (Vendor) High Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

Multiple vulnerabilities in UnrealIRCd might allow remote attackers to compromise the "unrealircd" account, or cause a Denial of Service.

Background

UnrealIRCd is an Internet Relay Chat (IRC) daemon.

Description

Multiple vulnerabilities have been reported in UnrealIRCd:

* The vendor reported a buffer overflow in the user authorization code.

* The vendor reported that the distributed source code of UnrealIRCd was compromised and altered to include a system() call that could be called with arbitrary user input.

Impact

A remote attacker could exploit these vulnerabilities to cause the execution of arbitrary commands with the privileges of the user running UnrealIRCd, or a Denial of Service condition. NOTE: By default UnrealIRCd on Gentoo is run with the privileges of the "unrealircd"
user.

Workaround

There is no known workaround at this time.

Resolution

All UnrealIRCd users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-irc/unrealircd-3.2.8.1-r1"

References

[ 1 ] UnrealIRCd Security Advisory 20090413
http://www.unrealircd.com/txt/unrealsecadvisory.20090413.txt [ 2 ] UnrealIRCd Security Advisory 20100612
http://www.unrealircd.com/txt/unrealsecadvisory.20100612.txt

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-201006-21.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-201006-21.xml

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer
50 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 32

OpenVAS Exploits

Date Description
2011-03-09 Name : Gentoo Security Advisory GLSA 201006-21 (unrealircd)
File : nvt/glsa_201006_21.nasl
2010-10-15 Name : UnrealIRCd User Authentication Buffer Overflow Vulnerability
File : nvt/gb_unrealircd_42077.nasl
2010-06-22 Name : UnrealIRCd Buffer Overflow Vulnerability
File : nvt/secpod_unrealircd_bof_vuln.nasl
2010-06-13 Name : Check for Backdoor in unrealircd
File : nvt/remote-irc-unrealircd-backdoor.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
65474 UnrealIRCd User Authorization Remote Overflow
65445 UnrealIRCd Trojaned Distribution

Unreal IRCD contains a backdoor in versions of 3.2.8.1 containing the MD5 checksum of MD5 checksum of 752e46f2d873c1679fa99de3f52a274d that may allow an attacker to execute arbitrary shell commands.

Snort® IPS/IDS

Date Description
2014-01-10 UnrealIRCd backdoor command execution attempt
RuleID : 25106 - Revision : 5 - Type : MALWARE-BACKDOOR

Nessus® Vulnerability Scanner

Date Description
2010-06-15 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201006-21.nasl - Type : ACT_GATHER_INFO
2010-06-14 Name : The remote IRC server contains a backdoor.
File : unreal_ircd_backdoor.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
Date Informations
2014-02-17 11:36:54
  • Multiple Updates