-----BEGIN PGP SIGNED MESSAGE----- =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : Olav ten Bosch Index : S-97-12 Distribution : World Page : 1 Classification: External Version: 1 Subject : HP-UX ppl vulnerability Date : 14-Feb-97 =============================================================================== By courtesy of HEWLETT-PACKARD we received information on a security vulnerability in the ppl executable on HP-UX: - ------------------------------------------------------------------------- HEWLETT-PACKARD SECURITY BULLETIN: #00053, 13 February 1997 - ------------------------------------------------------------------------- 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 [/usr]/bin/ppl PLATFORM: HP 9000 Series 700/800s running HP-UX releases 9.X & 10.X DAMAGE: Vulnerabilities exist allowing local users to gain root privileges. SOLUTION: Apply patch: PHNE_9378 for all platforms with HP-UX releases 9.X PHNE_9375 for all platforms with HP-UX releases 10.00/10.01 PHNE_9376 for all platforms with HP-UX releases 10.10 PHNE_9771 for all platforms with HP-UX releases 10.20 AVAILABILITY: All patches are available now. - ------------------------------------------------------------------------- I. A. Background A vulnerability with the ppl executable ([/usr]/bin/ppl) has been discovered. The fileset affected is Networking.SLIP-RUN. B. Fixing the problem The vulnerability can be eliminated from HP-UX releases 9.X and 10.X by applying the appropriate patch. C. Recommended solution 1. Determine which patch is appropriate for your operating system. 2. Hewlett-Packard's HP-UX patches are available via email and the World Wide Web To obtain a copy of the Hewlett-Packard 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 HP-UX patch downloading process 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. 4. Examine /tmp/update.log (9.X), or /var/adm/sw/swinstall.log (10.X), for any relevant WARNING's or ERROR's. D. Impact of the patch The patches for HP-UX releases 9.X and 10.X provide enhancements to the ppl executable to avoid this vulnerability. E. To subscribe to automatically receive future NEW HP Security Bulletins from the HP SupportLine mail service via electronic mail, do the following: 1) From your Web browser, access the URL: http://us-support.external.hp.com (US,Canada, Asia-Pacific, and Latin-America) http://europe-support.external.hp.com (Europe) 2) On the HP Electronic Support Center main screen, select the hyperlink "Support Information Digests". 3) On the "Welcome to HP's Support Information Digests" screen, under the heading "Register Now", select the appropriate hyperlink "Americas and Asia-Pacific", or "Europe". 4) On the "New User Registration" screen, fill in the fields for the User Information and Password and then select the button labeled "Submit New User". 5) On the "User ID Assigned" screen, select the hyperlink "Support Information Digests". 6) You should now be on the "HP Support Information Digests Main" screen. You might want to verify that your email address is correct as displayed on the screen. From this screen, you may also view/subscribe to the digests, including the security bulletins digest. 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- (not body) of 'get key' (no quotes) to security-alert@hp.com. ________________________________________________________________________ ============================================================================== CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet is the Dutch network for educational, research and related institutes. CERT-NL is a member of the Forum of Incident Response and Security Teams (FIRST). All CERT-NL material is available under: http://www.surfnet.nl/surfnet/security/cert-nl.html ftp://ftp.surfnet.nl/surfnet/net-security In case of computer or network security problems please contact your local CERT/security-team or CERT-NL (if your institute is NOT a SURFnet customer please address the appropriate (local) CERT/security-team). CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer, i.e. UTC+0100 in winter and UTC+0200 in summer (DST). Email: cert-nl@surfnet.nl Phone: +31 302 305 305 Fax: +31 302 305 329 Snailmail: SURFnet bv Attn. CERT-NL P.O. Box 19035 NL - 3501 DA UTRECHT The Netherlands A 7 * 24 hours phone number is available to SURFnet SSC's and FIRST members on request. ============================================================================== -----BEGIN PGP SIGNATURE----- Version: 2.6.2i iQCVAwUBMwRhXkU5nQkWIq1FAQGIRwP9G4jO+EvBq+Hl1iJmGJiWT78B7Ermac75 1LjwJ4rKfZIvpEm/SKR1aDgb0UFEI6i17Pv+MFUTvTvwL7MUBk3eFW/5eWyjvJIe vcaSNYjUwlJkn9WfgZeW+wNclEBJIxA0g/KDBQb8ZgjCXJygQnpgXgWjnCE4HTLQ 0qdoIJVHGvI= =YBVI -----END PGP SIGNATURE-----