Operating System:

Published:

22 August 2003

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                ESB-2003.0591 -- OpenBSD Security Advisory
                 OpenBSD 3.3: improper kernel bounds check
                              22 August 2003

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                kernel
Publisher:              OpenBSD
Operating System:       OpenBSD 3.3
Impact:                 Denial of Service
Access Required:        Existing Account

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An improper bounds check in the semget(2) system call can allow a
local user to cause a kernel panic.  No privilege escalation is
possible, the attack simply runs the kernel out of memory.  The bug
was introduced in OpenBSD 3.3, previous versions of OpenBSD are
unaffected.

The bug has been fixed in OpenBSD-current as well as the 3.3 stable
branch.  In addition, a patch is available for OpenBSD 3.3:
    ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.3/common/002_semget.patch

Credit goes to blexim for finding and reporting the problem.

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