#57725: A Local or Remote Unprivileged User May be Able to Cause a Denial of Service (DoS)of an FTP Server

Document Audience:	PUBLIC
Document ID:	57725
Title:	A Local or Remote Unprivileged User May be Able to Cause a Denial of Service (DoS)of an FTP Server
Update Date:	2005-02-14

Description

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Sun(sm) Alert Notification

Sun Alert ID: 57725
Synopsis: A Local or Remote Unprivileged User May be Able to Cause a Denial of Service (DoS) of an FTP Server
Category: Security
Product: Solaris
BugIDs: 5108531
Avoidance: Patch
State: Resolved
Date Released: 07-Feb-2005
Date Closed: 07-Feb-2005
Date Modified:

1. Impact A local or remote unprivileged user may be able to cause a Denial of Service (DoS) of an FTP server by using up all of the ports in the system.

This issue is described in CVE-1999-0079 which is available at http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0079.

2. Contributing Factors This issue can occur in the following releases:

SPARC Platform

Solaris 7 without patch 110646-06
Solaris 8 without patch 111606-05

x86 Platform

Solaris 7 without patch 110647-06
Solaris 8 without patch 111607-05

Note: Solaris 9 is not affected by this issue.

3. Symptoms A number of ports that are unused will be in a "listen" state. To display this condition:

1) Determine the process id (pid) of the in.ftpd(1M) process or processes on the system using pgrep(1). For example:

    $ /usr/bin/pgrep in.ftpd

2) Next, issue the pfiles(1) command as the root user for each pid displayed and check for a large number of ports in the "listen" state. The following command can be run as the root user to execute pfiles(1) against all of the in.ftpd(1M) processes on the system:

    # /usr/proc/bin/pfiles `/usr/bin/pgrep in.ftpd`

Solution Summary

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4. Relief/Workaround There is no workaround. Please see the "Resolution" section below.

5. Resolution This issue is addressed in the following releases:

SPARC Platform

Solaris 7 with patch 110646-06 or later
Solaris 8 with patch 111606-05 or later

x86 Platform

Solaris 7 with patch 110647-06 or later
Solaris 8 with patch 111607-05 or later

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