CVE-2001-1056

Name: CVE-2001-1056
Creator: NVD / NIST
Published: 2001-07-30T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.44%

Last modified Jun 16, 2026

CVE-2001-1056 is a vulnerability of currently unknown severity. IRC DCC helper in the ip_masq_irc IP masquerading module 2.2 allows remote attackers to bypass intended firewall restrictions by causing the target system to send a "DCC SEND" request to a malicious server which listens on port 6667, which may cause the module to believe that the traffic is a valid request and allow the connection to the port specified in the DCC SEND request.. EPSS estimates a 2.44% chance of exploitation in the next 30 days.

Description

IRC DCC helper in the ip_masq_irc IP masquerading module 2.2 allows remote attackers to bypass intended firewall restrictions by causing the target system to send a "DCC SEND" request to a malicious server which listens on port 6667, which may cause the module to believe that the traffic is a valid request and allow the connection to the port specified in the DCC SEND request.

Metrics

EPSS Probability

2.44%

82.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	> 2.0.1, <= 2.0.18
Linux	Linux Kernel	>= 2.2.0, <= 2.2.18

References

http://archives.neohapsis.com/archives/bugtraq/2001-07/0733.htmlBroken Link
http://archives.neohapsis.com/archives/bugtraq/2001-07/0750.htmlBroken Link
http://www.iss.net/security_center/static/6923.phpBroken Link
http://www.osvdb.org/1916Broken Link
http://www.securityfocus.com/bid/3117Third Party Advisory, Vendor Advisory
http://archives.neohapsis.com/archives/bugtraq/2001-07/0733.htmlBroken Link
http://archives.neohapsis.com/archives/bugtraq/2001-07/0750.htmlBroken Link
http://www.iss.net/security_center/static/6923.phpBroken Link
http://www.osvdb.org/1916Broken Link
http://www.securityfocus.com/bid/3117Third Party Advisory, Vendor Advisory

Timeline

Published: Jul 30, 2001
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2001-1056?

How severe is CVE-2001-1056?

Severity scoring for CVE-2001-1056 is pending analysis. The EPSS model estimates a 2.44% probability of exploitation in the next 30 days.

How do I fix CVE-2001-1056?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2001-1056?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST