Forwarded From: RSI Advise <adviset_private> RSI.0006.06-25-98.HP-UX.RLPDAEMON |:::. |::::: |::::. |::::: |::::: |::::. .. :: .. .. :: .. .. .. :: |:::: |:::: |:::: :::::: |::::: |:::: |: |: :: |: |: |:: |: |: :: |: :: |::::: |: |::::: |::::: |::::: Repent Security Incorporated, RSI [ http://www.repsec.com ] *** RSI ALERT ADVISORY *** --- [CREDIT] -------------------------------------------------------------- Bathead Brian: Discovered vulnerability, co-authored advisory Mark Zielinski: Author of advisory --- [SUMMARY] ------------------------------------------------------------- Announced: June 25, 1998 Report code: RSI.0005.06-25-98.HP-UX.RLPDAEMON Report title: HP-UX rlpdaemon Vulnerability: Several vulnerabilities have been discovered which could potentially allow remote access to the server Vendor status: Vendor notified on 06-28-98 Patch status: No patch is currently available Platforms: HP-UX 9.x, 10.x Vulnerable: HP-UX systems running rlpdaemon Reference: http://www.repsec.com/advisories.html Impact: If exploited, an attacker could potentially compromise lp access and create files on the server remotely --- [DETAILS] ------------------------------------------------------------- Problem: Vulnerabilities: ~~~~~~~~~~~~~~~~ #1: The argument in the Unlink Data File section of the control file gets passed to /bin/rm by a system () call. This argument should normally be a filename, however, a semi-colon and an arbitrary command can be appended allowing you to execute commands as user lp. #2: When the client passes a file to the rlpdaemon, no sanity checks are performed to ensure the validity of the filename. This allows for a remote attacker to send any file s/he wants and have it stored in the user lp's home directory. #3: The rlpdaemon will allow remote connections from any source port. This violates the lpd behavior recommended in RFC-1179 which explicitly states that only source ports of 721-731 should be allowed to access the daemon. --- [FIX] ----------------------------------------------------------------- Solution: Disable the rlpdaemon and use networked printers. 1. su to the ROOT account 2. kill -9 `ps -fu root | grep -i rlpdaemon | awk '{print $2}'` 3. edit /etc/inetd.conf with your favorite editor 4. place a # infront of the line reading as follows: printer stream tcp nowait root /usr/sbin/rlpdaemon rlpdaemon -i 5. kill -HUP `ps -fu root | grep -i inetd | awk '{print $2}'` --- [PATCH] --------------------------------------------------------------- Solution: Wait for Hewlett-Packard to release an official patch. --------------------------------------------------------------------------- Repent Security Incorporated (RSI) 13610 N. Scottsdale Rd. Suite #10-326 Scottsdale, AZ 85254 E-mail: adviset_private WWW: http://www.repsec.com FTP: ftp://ftp.repsec.com --------------------------------------------------------------------------- -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.2 mQCNAzU6dqAAAAEEAOHt9a5vevjD8ZjsEmncEbFp2U7aeqvPTcF/8FJMilgOVp75 dshXvZixHsYU7flgCNzA7wLIQPWBQBrweLG6dx9gE9e5Ca6yAJxZg8wNsi06tZfP nvmvf6F/7xoWS5Ei4k3YKuzscxlyePNNKws6uUe2ZmwVoB+i3HHT44dOafMhAAUT tBpSZXBTZWMgPGFkdmlzZUByZXBzZWMuY29tPg== =ro8H -----END PGP PUBLIC KEY BLOCK----- Copyright June 1998 RepSec, Inc. The information in this document is provided as a service to customers of RepSec, Inc. Neither RepSec, Inc., nor any of it's employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process contained herein, or represents that its use would not infringe any privately owned rights. Reference herein to any specific commercial products, process, or services by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by RepSec, Inc. The views and opinions of authors express herein do no necessarily state or reflect those of RepSec, Inc., and may not be used for advertising or product endorsement purposes. 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. This alert advisory may be reproduced and distributed, without permission, in its entirety only, by any person provided such reproduction and/or distribution is performed for non-commercial purposes and with the intent of increasing the awareness of the Internet community. --------------------------------------------------------------------------- RepSec, Inc. are trademarks of RepSec, Inc. All other trademarks are property of their respective holders. -o- Subscribe: mail majordomot_private with "subscribe isn". Today's ISN Sponsor: Repent Security Incorporated [www.repsec.com]
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