Khaled Mardam-Bey mIRC up to 6.1 irc: URI memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Khaled Mardam-Bey mIRC up to 6.1. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the component irc: URI Handler. The manipulation leads to memory corruption. This vulnerability is known as CVE-2003-1336. The attack can be launched remotely. Furthermore, there is an exploit available. It is recommended to upgrade the affected component. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability was found in Khaled Mardam-Bey mIRC up to 6.1 (Chat Software). It has been classified as problematic. Affected is an unknown functionality of the component irc: URI Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in mIRC before 6.11 allows remote attackers to execute arbitrary code via a long irc:// URL.

The bug was discovered 10/14/2003. The weakness was published 10/13/2003 by Phuong Nguyen (Website). The advisory is available at securiteam.com. This vulnerability is traded as CVE-2003-1336 since 09/23/2007. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

The exploit is shared for download at securiteam.com. It is declared as highly functional. As 0-day the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122212 (mIRC IRC URI Handler Buffer Overflow Vulnerability).

Upgrading to version 6.11 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at mirc.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (13405), Exploit-DB (112), SecurityFocus (BID 8819†), OSVDB (2665†) and Secunia (SA9996†). Further details are available at vuldb.com. Similar entry is available at VDB-329. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: mirc_irc_url.rb
MetaSploit Name: mIRC IRC URL Buffer Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mIRC 6.11
Patch: mirc.com

Timelineinfo

10/13/2003 🔍
10/14/2003 +1 days 🔍
10/14/2003 +0 days 🔍
10/14/2003 +0 days 🔍
12/31/2003 +77 days 🔍
12/31/2003 +0 days 🔍
09/23/2007 +1362 days 🔍
07/13/2014 +2485 days 🔍
07/14/2025 +4018 days 🔍

Sourcesinfo

Advisory: securiteam.com⛔
Researcher: Phuong Nguyen
Status: Confirmed

CVE: CVE-2003-1336 (🔍)
GCVE (CVE): GCVE-0-2003-1336
GCVE (VulDB): GCVE-100-330
X-Force: 13405 - mIRC long string supplied to IRC protocol could allow execution of code, High Risk
SecurityFocus: 8819 - mIRC IRC URL Buffer Overflow Vulnerability
Secunia: 9996 - mIRC IRC URI Handler Buffer Overflow Vulnerability, Moderately Critical
OSVDB: 2665 - mIRC IRC URI Handler Overflow
SecuriTeam: securiteam.com
Vulnerability Center: 45356 - mIRC Before 6.11 Remote Code Execution via a Long URL, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/14/2003 02:40 PM
Updated: 07/14/2025 01:26 AM
Changes: 10/14/2003 02:40 PM (61), 10/08/2018 03:43 PM (27), 03/30/2025 11:28 AM (17), 07/14/2025 01:26 AM (2)
Complete: 🔍
Cache ID: 18:415:40

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