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bfece22130
a/haveged-1.9.17-x86_64-2.txz: Rebuilt.
Install /etc/rc.d/rc.haveged as non-executable. For existing installations
running a recent kernel, it is safe to turn this off.
Back when we added the haveged package we were using the 4.4 kernel, but
since Linux 5.4 this same entropy generating algorithm has been built into
the kernel, so there's no reason to also run it in userspace. We'll keep
the package around (for now, anyway) in case someone might be running an
old kernel. Thanks to Jason A. Donenfeld.
a/sysvinit-scripts-15.0-noarch-10.txz: Rebuilt.
rc.S, rc.6: use the seedrng utility to seed and initialize the kernel
random number generator and generate a new seed.
If seedrng is missing, we'll attempt to do these things with scripting.
Thanks to Jason A. Donenfeld for hints about how to make a modest
improvement in that regard (blame me for any problems with my own changes),
but because you can't force the kernel RNG to initialize with a script
(it needs an ioctl), you won't get the same guarantees that you do when
using the new seedrng utility.
a/util-linux-2.38-x86_64-2.txz: Rebuilt.
Added seedrng utility, used to seed and initialize the kernel random number
generator and to generate new seeds for carrying entropy across reboots.
Thanks to Jason A. Donenfeld.
n/libmnl-1.0.5-x86_64-1.txz: Upgraded.
n/libnfnetlink-1.0.2-x86_64-1.txz: Upgraded.
xap/mozilla-thunderbird-91.8.0-x86_64-1.txz: Upgraded.
This release contains security fixes and improvements.
For more information, see:
https://www.mozilla.org/en-US/thunderbird/91.8.0/releasenotes/
https://www.mozilla.org/en-US/security/advisories/mfsa2022-15/
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1097
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28281
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1197
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1196
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28282
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28285
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28286
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-24713
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28289
(* Security fix *)
41 lines
1.7 KiB
Groff
41 lines
1.7 KiB
Groff
.TH seedrng 8
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.SH NAME
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seedrng \- seed the Linux kernel random number generator
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.SH SYNOPSIS
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.B seedrng
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.SH DESCRIPTION
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.B SeedRNG
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SeedRNG is a simple program made for seeding the Linux kernel random
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number generator from seed files. The program takes no arguments, must
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be run as root, and always attempts to do something useful.
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This program is useful in light of the fact that the Linux kernel RNG
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cannot be initialized from shell scripts, and new seeds cannot be safely
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generated from boot time shell scripts either.
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It should be run once at init time and once at shutdown time. It can be
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run at other times without detriment as well. Whenever it is run, it writes
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existing seed files into the RNG pool, and then creates a new seed file.
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If the RNG is initialized at the time of creating a new seed file, then that
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new seed file is marked as "creditable", which means it can be used to
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initialize the RNG. Otherwise, it is marked as "non-creditable", in which
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case it is still used to seed the RNG's pool, but will not initialize the
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RNG.
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In order to ensure that entropy only ever stays the same or increases from
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one seed file to the next, old seed values are hashed together with new seed
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values when writing new seed files:
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.BR
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new_seed = new_seed[:-32] || HASH(fixed_prefix || real_time || boot_time || old_seed_len || old_seed || new_seed_len || new_seed)
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The seed is stored in /var/lib/seedrng/, which can be adjusted at
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compile time. If the SEEDRNG_SKIP_CREDIT environment variable is set to 1,
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true, yes, or y, then seeds never credit the RNG, even if the seed file
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is creditable.
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.SH FILES
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.IR /var/lib/seedrng/seed.credit
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.IR /var/lib/seedrng/seed.no-credit
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.SH AUTHOR
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Jason A. Donenfeld <Jason@zx2c4.com>
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