OpenBSD Journal

OpenBSD Journal

Theo on the latest Intel issues

Contributed by Paul 'WEiRD' de Weerd on from the the gift that keeps on giving dept.

Theo de Raadt (deraadt@) posted to the tech@ mailing list with some background on how the latest discovered Intel CPU issues relate to OpenBSD.

Date: Wed, 15 Aug 2018 00:31:16 -0600
From: Theo de Raadt [elided]
To: tech@openbsd.org
Subject: CVE-2018-3615, CVE-2018-3620, CVE-2018-3646

These 3 issues all relate to a bug in Intel cpus

The cpu will speculatively honour invalid PTE against data in the
on-core L1 cache.  Memory disclosure occurs into the wrong context.

These 3 issues (CVE-2018-3615, CVE-2018-3620, CVE-2018-3646) together
are the currently public artifacts of this one bug.

Read more…

Happy Bob's Libtls tutorial

Contributed by rueda on from the sane-APIs dept.

Bob Beck (beck@ when wearing OpenBSD-only hat) has written a tutorial on using libtls:

[…]

This tutorial is designed for people with some C experience on a POSIX, BSD like machine with the latest libtls installed. It focuses on changes that are necessary to make an existing program written in C that uses the POSIX sockets api to use TLS over those same connections.

[…]

mandoc-1.14.4 released

Contributed by rueda on from the i'm-mandoc(1)-fly-me dept.

Ingo Schwarze (schwarze@ when wearing OpenBSD-only hat) wrote in to let us know about the new release:

From: Ingo Schwarze [elided]
Date: Wed, 8 Aug 2018 22:21:13 +0200
To: discuss@mandoc.bsd.lv
Subject: mandoc-1.14.4 released

Hello,

after a full year of tranquil development, i just released mandoc-1.14.4.
This is a regular maintenance release.  As there are no major structural
changes, i expect it to be very stable, so all downstream systems are
encouraged to upgrade from any earlier version.

Read more…

g2k18 hackathon report: Kenneth Westerback on dhcpd(8) fixes, disklabel(8) refactoring and more

Contributed by Peter N. M. Hansteen on from the refactor the factors dept.

A new g2k18 hackathon report has arrived, this time from Kenneth Westerback (krw@), who writes:

Other than missing a connection due to "seat maintenance" in YYZ, travel was uneventful. I arrived MUC (twelve hours late) and spent a week hacking with bluhm@ and mpi@ at Genua's Geekweek, to which bluhm@ had kindly arranged an invitation. I managed to start committing some disklabel(8) code refactoring otto@ and I have been discussing for a while. Mostly cleaning up partition offset and size rounding code. I also tightened up some dhcpd(8) man page ambiguity as requested by sthen@ and started by jmc@. I ok'ed a mpi@ fix for a dhclient(8) issue and reviewed and ok'ed various diffs from bluhm@.

Read more…

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OpenBSD Errata

OpenBSD 6.3

0162018-08-04 RELIABILITY Incorrect initialization of the FPU caused floating point exceptions when running on Xen.
0152018-07-31 SECURITY IO port permissions were incorrectly restricted.
0142018-07-31 SECURITY On AMD CPUs, set a chicken bit which turns LFENCE into a serialization instruction against speculation.
0132018-07-25 RELIABILITY When an IPsec key expired, the kernel could panic due to unfinished timeout tasks.
0122018-07-25 RELIABILITY A regular user could trigger a kernel panic by executing an invalid ELF binary.
0112018-06-21 SECURITY Perl's Archive::Tar module could be made to write files outside of its working directory.

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