1-Лабораторная_Мировые информационные ресурсы / 1_7 / ERRATA

FreeBSD 4.10-RELEASE Errata

The FreeBSD Project

Copyright (c) 2000, 2001, 2002, 2003, 2004 The FreeBSD Documentation
Project

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trademarks or registered trademarks of Intel Corporation or its
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Many of the designations used by manufacturers and sellers to distinguish
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symbol.

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This document lists errata items for FreeBSD 4.10-RELEASE, containing
significant information discovered after the release or too late in the
release cycle to be otherwise included in the release documentation.
This information includes security advisories, as well as news relating
to the software or documentation that could affect its operation or
usability. An up-to-date version of this document should always be
consulted before installing this version of FreeBSD.

This errata document for FreeBSD 4.10-RELEASE will be maintained until
the release of FreeBSD 4.11-RELEASE.

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1 Introduction

This errata document contains ``late-breaking news'' about FreeBSD
4.10-RELEASE. Before installing this version, it is important to consult
this document to learn about any post-release discoveries or problems that
may already have been found and fixed.

Any version of this errata document actually distributed with the release
(for example, on a CDROM distribution) will be out of date by definition,
but other copies are kept updated on the Internet and should be consulted
as the ``current errata'' for this release. These other copies of the
errata are located at http://www.FreeBSD.org/releases/, plus any sites
which keep up-to-date mirrors of this location.

Source and binary snapshots of FreeBSD 4-STABLE also contain up-to-date
copies of this document (as of the time of the snapshot).

For a list of all FreeBSD CERT security advisories, see
http://www.FreeBSD.org/security/ or
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/.

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2 Security Advisories

No active security advisories.

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3 Late-Breaking News

(20 May 2004) A security problem was discovered in CVS but the release
notes did not state that since it was very late in the release cycle.
FreeBSD 4.10-RELEASE includes a fix for it and is not vulnerable. For the
details, see the security advisory FreeBSD-SA-04:10.

(23 May 2004) As a side effect of closing a security problem related to
msync(2), the MS_INVALIDATE flag no longer guarantees that all pages in
the range are invalidated. This can cause problems when pages are backed
by a remote file (e.g. via NFS) where other machines can write to the
permanent storage since the local pages not being invalidated might then
contain stale data. The security problem being addressed is a strictly
local exploit, and only allows a local user to block the writing of data
to a file under certain circumstances. Users who require the old semantics
of MS_INVALIDATE and are not concerned with the security issue being fixed
can set the vm.old_msync sysctl to 1 which will revert to the old
(insecure) behavior.

(25 May 2004) The twe(4) driver was recently updated by the vendor.
Problems have been reported in rare circumstances under conditions that
are hard to reproduce. Work is ongoing to isolate these problems and
determine their source.

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This file, and other release-related documents, can be downloaded from
ftp://ftp.FreeBSD.org/.

For questions about FreeBSD, read the documentation before contacting
<questions@FreeBSD.org>.

For questions about this documentation, e-mail <doc@FreeBSD.org>.