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CVE-2001-1056
IRC DCC helper in the ip_masq_irc IP masquerading module 2.2 allows remote attackers to bypass intended firewall restrictions by causing…
High7.5EPSS 2.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.4% · top 16% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (5)
- 20010730 Re: [RAZOR] Linux kernel IP masquerading vulnerability (_actual_ patch) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20010730 [RAZOR] Linux kernel IP masquerading vulnerability (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- linux-ipmasqirc-bypass-protection(6923) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 1916 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 3117 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2001-1056)Record last updated .