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             AUSCERT External Security Bulletin Redistribution

                ESB-2003.0150 -- OpenBSD Security Advisory
                     Potential buffer overflow in lprm
                               06 March 2003

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

Product:                lprm
Vendor:                 OpenBSD
Operating System:       OpenBSD 3.1
                        OpenBSD 3.2
                        Linux
                        UNIX
Impact:                 Root Compromise
Access Required:        Existing Account

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A bounds check that was added to lprm in 1996 does its checking too
late to be effective.  Because of the insufficient check, it may
be possible for a local user to exploit lprm to gain elevated
privileges.  It is not know at this time whether or not the bug is
actually exploitable.

Starting with OpenBSD 3.2, lprm is setuid user daemon which limits
the impact of the bug.  OpenBSD 3.1 and below however, ship with
lprm setuid root so this is a potential localhost root hole on older
versions of OpenBSD.

The bug is fixed in OpenBSD-current as well as the 3.2 and 3.1
- -stable branches.

Patch for OpenBSD 3.1:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.1/common/023_lprm.patch

Patch for OpenBSD 3.2:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.2/common/010_lprm.patch

Thanks go to Arne Woerner for noticing this bug.

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