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- RSI.0011.11-12-98.AIX.INFOD
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- Repent Security Incorporated, RSI
- [ http://www.repsec.com ]
-
-
- *** RSI ALERT ADVISORY ***
-
-
- --- [CREDIT] --------------------------------------------------------------
-
- Andrew Green: Discovered the vulnerability
- Mark Zielinski: Author of the advisory
-
- --- [SUMMARY] -------------------------------------------------------------
-
- Announced: November 09, 1998
- Report code: RSI.0011.11-12-98.AIX.INFOD
- Report title: AIX infod
-
- Vulnerability: Please see the details section
- Vendor status: AIX contacted on November 12, 1998
- Patch status: IBM is currently working on several fixes
-
- Platforms: AIX 3.2.x, 4.1.x, 4.2.x, 4.3.x
-
- Reference: http://www.repsec.com/advisories.html
- Impact: If exploited, an attacker could potentially compromise
- root access locally on your server
-
- --- [DETAILS] -------------------------------------------------------------
-
- Description: The Info Explorer daemon is a AIX utility which is used
- to provide documentation for the operating system and
- associated programs.
-
- Problem: The info daemon does not perform any validation on information
- passed to the local socket that it is bound to. Users on the
- system can send false information to the daemon and trick
- it into spawning a connection to the intruders X display.
-
- Details: By sending a UID and GID of 0, along with a false environment,
- infod will be forced into spawning a connection with root
- privileges to the intruder's X display.
-
- Once the program appears on the screen, they can goto
- the default options menu and change the printer command
- line to an alternate binary such as /bin/sh that gives
- privileges to the account the session was spawned under.
-
-
- --- [FIX] -----------------------------------------------------------------
-
- Solution: IBM is currently working on the following fixes which will be
- available soon:
-
- AIX 3.2.x: upgrade to version 4
- AIX 4.1.x: IX84640
- AIX 4.2.x: IX84641
- AIX 4.3.x: IX84642
-
- Until the fixes can be applied, the infod daemon should be disabled.
- Run the following commands as root:
-
- # stopsrc -s infod
- # rmitab infod
- # chown root.system /usr/lpp/info/bin/infod
- # chmod 0 /usr/lpp/info/bin/infod
-
-
- ---------------------------------------------------------------------------
-
- Repent Security Incorporated (RSI)
- 13610 N. Scottsdale Rd.
- Suite #10-326
- Scottsdale, AZ 85254
-
- E-Mail: advise@repsec.com
- FTP: ftp://ftp.repsec.com
- WWW: http://www.repsec.com
-
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-
- Copyright November 1998 RepSec, Inc.
-
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- any warranty, express or implied, or assumes any legal liability or
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-
- The material in this alert advisory may be reproduced and distributed,
- without permission, in whole or in part, by other security incident
- response teams (both commercial and non-commercial), provided the above
- copyright is kept intact and due credit is given to RepSec, Inc.
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