home *** CD-ROM | disk | FTP | other *** search
- Digest Name: security_info
- Description: Daily Security Bulletins Digest
- Created: Wed Feb 07 03:00:01 1996 PST
-
-
- -------------------------------------------------------------------------------
- Summary of 'Daily Security Bulletins Digest' documents
- -------------------------------------------------------------------------------
- Document Id Description Page 1
- -------------------------------------------------------------------------------
- HPSBUX9602-029 Security Vulnerability in HP-UX syslog(3) subroutine
-
- ===============================================================================
- Detailed list of 'Daily Security Bulletins Digest' documents
- ===============================================================================
- Document Id: [HPSBUX9602-029]
- Date Loaded: [02-07-96]
-
- Description: Security Vulnerability in HP-UX syslog(3) subroutine
- ===============================================================================
-
- -------------------------------------------------------------------------
- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX9602-029, 7 Feb 96
- -------------------------------------------------------------------------
-
- Hewlett-Packard recommends that the information in the following
- Security Bulletin should be acted upon as soon as possible. Hewlett-
- Packard will not be liable for any consequences to any customer resulting
- from customer's failure to fully implement instructions in this Security
- Bulletin as soon as possible.
-
- ________________________________________________________________________
- PROBLEM: Security vulnerability in syslog(3) subroutine in all releases
- of HP-UX prior to 10.10
- PLATFORM: HP 9000 series 300/400s and 700/800s
- DAMAGE: The vulnerability potentially allows an attacker to gain
- super-user permissions on the host.
-
- SOLUTION: Apply patch PHCO_6595 (series 700/800, HP-UX 10.0, 10.01), or
- PHCO_6598 (series 800, HP-UX 9.X), or
- PHCO_6597 (series 700, HP-UX 9.0X), or
- PHCO_6224 (series 300/400, HP-UX 9.X), or
- PHCO_6162 (series 700, HP-UX 9.08 BLS), or
- PHCO_6161 (series 700, HP-UX 9.09 BLS), or
- PHCO_6160 (series 700, HP-UX 9.09+ BLS), or
- PHCO_6157 (series 700, HP-UX 10.09 BLS CMW).
-
- AVAILABILITY:
- All patches are available now, except for the BLS patches,
- which will be available after 29 February, 1996. Contact your
- FCO representative for patch availability .
-
- ________________________________________________________________________
- I. Update
-
-
- A. Background
-
- A recent CERT advisory (CERT CA-95:13) described a vulnerability
- in the syslog(3) subroutine. Widely discussed, the "sendmail" program
- is one vector for the attack. Although "sendmail" was used as an
- example for exploitation, other programs that use syslog(3) could
- also be exploited. Hewlett-Packard has chosen to patch the root
- cause of this problem, which is a buffer-overrun problem.
-
- The vulnerability allows users to to gain super-user permissions on
- the host. If the patch for the appropriate release of HP-UX is
- properly installed, the vulnerability cannot be exploited.
-
- It has been found that all HP-UX systems prior to HP-UX 10.10 have
- this vulnerability.
-
- B. Fixing the problem
-
- The vulnerability can be eliminated from releases 9.X and 10.0X of
- HP-UX by applying a patch. Releases of HP-UX prior to 9.X must
- upgraded to release 9.X or higher to escape the vulnerability,
- which is fixed in the HP-UX 10.10 release. There are no work-around
- solutions known.
-
- Hewlett-Packard recommends that all customers concerned with the
- security of their HP-UX systems either apply the appropriate
- patch or change perform the actions described above as soon as
- possible.
-
- Side effects: None known to date.
-
- C. How to Install the Patch (for HP-UX 9.X and 10.X)
-
-
- 1. Determine which patch is appropriate for your hardware platform
- and operating system:
-
- PHCO_6595 (series 700/800, HP-UX 10.0 & 10.01), or
- PHCO_6598 (series 800, HP-UX 9.0 & 9.04), or
- PHCO_6597 (series 700, HP-UX 9.0[1357]), or
- PHCO_6224 (series 300/400, HP-UX 9.01, 9.03 & 9.1), or
- PHCO_6162 (series 700, HP-UX 9.08 BLS), or
- PHCO_6161 (series 700, HP-UX 9.09 BLS), or
- PHCO_6160 (series 700, HP-UX 9.09+ BLS), or
- PHCO_6157 (series 700, HP-UX 10.09 BLS CMW).
-
-
- 2. Hewlett Packard's HP-UX patches are available via email
- and World Wide Web
-
- To obtain a copy of the HP SupportLine email service user's
- guide, send the following in the TEXT PORTION OF THE MESSAGE to
- support@us.external.hp.com (no Subject is required):
-
- send guide
-
- The users guide explains the process for downloading HP-UX
- patches via email and other services available.
-
- World Wide Web service for downloading of patches
- is available via our URL:
- (http://us.external.hp.com)
-
- 3. Apply the patch to your HP-UX system.
- Check for warnings or errors per the patch installation
- instructions. The logs are: (for 9.X), /tmp/update.log, or for
- 10.X, /var/adm/sw/swinstall.log. This can be done as follows:
-
- a. At the shell prompt, type "tail -60 /tmp/update.log | more"
- In 10.X check using "tail -60 /var/adm/sw/swinstall.log | more"
- b. Page through the next three screens via the space bar,
- looking for WARNING or ERROR messages.
-
-
- D. Impact of the patch and workaround
-
- The patch for HP-UX releases 9.x and 10.x provides a new version of
- libc which fixes the vulnerability.
- No patches will be available for versions of HP-UX prior to 9.0.
- To protect those affected systems, we recommend upgrading to a
- currently supported release of HP-UX.
-
-
- E. To subscribe to automatically receive future NEW HP Security
- Bulletins from the HP SupportLine mail service via electronic
- mail, send an email message to:
-
- support@us.external.hp.com (no Subject is required)
-
- Multiple instructions are allowed in the TEXT PORTION OF THE
- MESSAGE, here are some basic instructions you may want to use:
-
- To add your name to the subscription list for new security
- bulletins, send the following in the TEXT PORTION OF THE MESSAGE:
-
- subscribe security_info
-
- To retrieve the index of all HP Security Bulletins issued to
- date, send the following in the TEXT PORTION OF THE MESSAGE:
-
- send security_info_list
-
- To get a patch matrix of current HP-UX and BLS security
- patches referenced by either Security Bulletin or Platform/OS,
- put the following in the text portion of your message:
-
- send hp-ux_patch_matrix
-
- World Wide Web service for browsing of bulletins
- is available via our URL:
- (http://us.external.hp.com)
-
- Choose "Support news", then under Support news,
- choose "Security Bulletins"
-
-
- F. To report new security vulnerabilities, send email to
-
- security-alert@hp.com
-
- Please encrypt exploit information using the security-alert PGP
- key, available from your local key server, or by sending a
- message with a subject of 'get key' (no quotes) to
- security-alert@hp.com.
-
- ________________________________________________________________________
-
- --
- jrah@ssec.honeywell.com
-
- Life is like a pair of linen pants. There's always another wrinkle.
-
-