CVE-2001-1056

Severity

75%

Complexity

99%

Confidentiality

106%

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.

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.

CVSS 2.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P).

Overview

First reported 23 years ago

2001-07-30 04:00:00

Last updated 6 years ago

2018-09-20 18:45:00

Affected Software

Linux Kernel

References

20010730 [RAZOR] Linux kernel IP masquerading vulnerability

Broken Link

20010730 Re: [RAZOR] Linux kernel IP masquerading vulnerability (_actual_ patch)

Broken Link

linux-ipmasqirc-bypass-protection(6923)

Broken Link

1916

Broken Link

3117

Third Party Advisory, Vendor Advisory

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