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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2001.247 -- OpenBSD Security Advisory patch for exec+ptrace security hole available 21 June 2001 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: execve(2) Vendor: OpenBSD Operating System: OpenBSD Impact: Increased Privileges Access Required: Existing Account - --------------------------BEGIN INCLUDED TEXT-------------------- A race condition exists in the kernel execve(2) implementation that opens a small window of vulnerability for a non-privileged user to ptrace(2) attach to a suid/sgid process. 2.8 patch: ftp://ftp.openbsd.org/pub/OpenBSD/patches/2.8/common/030_kernexec.patch 2.9 patch: ftp://ftp.openbsd.org/pub/OpenBSD/patches/2.9/common/007_kernexec.patch The fix has also been committed to the 2.8 and 2.9 stable branches. The bug was found by Georgi Guninski; Art Grabowski came up with a fix. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOzHoJSh9+71yA2DNAQHkvQP/cwrGo5AO+nJcZg/7zsQdQQvJ+F8yijyO PLoPJP5lAn9CRtOnPsmTaz5gtK+23l9A33NCk9/8ZfGYmss0B0IJLXGfeZ6Ar+wU buKl5nUA3YM0i5jKQKqBW7l7KQg1wCK7bM3F6su8vThmPElUtx1dbztIpN70FOTP d3W/QmYLoAY= =fOxz -----END PGP SIGNATURE-----