News

Bron: [url=http://www.slashdot.org]SlashDot[/url]

Hier staat een uitgebreide analyse over het gevaar wanneer breedband gebruikers‚ met minder veilige operating systemen‚ grootschaling besmet worden met worms en trojan horses.

[quote]If you can control a million hosts on the Internet‚ you can do enormous damage. First‚ you can launch distributed denial of service (DDOS) attacks so immensely diffuse that mitigating them is well beyond the state-of-the-art for DDOS traceback and protection technologies. Such attacks could readily bring down e-commerce sites‚ news outlets‚ command and coordination infrastructure‚ specific routers‚ or the root name servers.
[/quote]

[url=http://www.icir.org/vern/papers/cdc-usenix-sec02/index.html]Het hele artikel[/url]

Bron: [url=http://www.deadly.org]Deadly.org[/url]

Hier een leuk artikel over hoe iemand‚ die gefrustreerd raakte van Slackware en daarom overstapte op OpenBSD‚ dezelfde configuratie binnen 30 minuten voor elkaar kreeg wat met Slack in 3 weken niet lukte.

[quote]”OpenBSD‚ ay?” my Scottish language acquisition device piped‚ and before I could say “what the…”‚ my Nucleus ventroposteriores medialis gave the order to check it out (tricky little nerve bundle in our mid-brain)‚ and I was confronted with a large blowfish‚ OpenBSD’s icon.
[/quote]

[url=http://www.lowendpc.com/dp/2002/0524.html]Het hele artikel[/url]

Bron: [url=http://www.webwereld.nl]Webwereld[/url]

Een team van wetenschappers heeft een nieuwe mijlpaal bereikt. Zij transporteerden 625 MB van Alaska naar Amsterdam in dertien seconden.

Voor dit record werd gebruik gemaakt van Internet 2 en het Nederlandse SURFnet, netwerken die gebruikt worden voor wetenschappelijke doeleinden. Over een afstand van 12.272 kilometer werden 625 MB aan data (ruwweg de inhoud van een cd) overgepompt van Fairbanks, Alaska naar Amsterdam.

Dit gebeurde in een schamele dertien seconden, wat neerkomt op een snelheid van 401 megabits per seconde, oftewel achtduizend keer zo snel dan het snelste inbelmodem. De recordpoging werd gedaan door een team bestaande uit wetenschappers van de Universiteit van Alaska en de Faculteit der Natuurwetenschappen, Wiskunde en Informatica van de Universiteit van Amsterdam in samenwerking met SURFnet.

[url=http://www.webwereld.nl/nieuws/11247.phtml]Het hele artikel[/url]

Bron: [url=http://news.com.com]Cnet[/url]

Hackers kunnen de meeste grote systemen makkelijk binnendringen omdat veel mensen veel te makkelijke password kiezen. In het volgende artikel kan je daar meer over lezen.

[quote]Retrieving the password file from one of the health care company’s servers‚ the consulting firm put “John the Ripper‚” a well-known cracking program‚ on the case. While well-chosen passwords could take years–if not decades–of computer time to crack‚ it took the program only an hour to decipher 30 percent of the passwords for the nearly 10‚000 accounts listed in the file.
[/quote]

[url=http://news.com.com/2009-1001-916719.html?tag=fd_lede]Het hele artikel[/url]

Bron: [url=http://www.webwereld.nl]Webwereld[/url]

De bestaande proef in de Arnhemse wijk Rijkerswoerd wordt voortgezet, zo zegt Nuon-woordvoerder Bart Sikking. Deze proef ging eind vorig jaar van start en zou in eerste instantie in februari van dit jaar moeten zijn afgesloten. Het ziet er echter niet naar uit dat het energiebedrijf binnenkort uitgeëxperimenteerd is.

Rijkerswoerd is namelijk door Nuon gebombardeerd als ‘semi-permanente proeftuin’. Aan de ‘Digistroom’-proef doen 180 huishoudens mee, die volgens Sikking zeer tevreden zijn. Bij powerline communication – zoals de techniek wordt genoemd – wordt internet aangeboden via het laagspanningsnet dat de woningen binnenkomt.

Hierbij worden de internet-signalen door speciale apparatuur gescheiden van de stroom. Naast de beschikbare bandbreedte zien de testpersonen de beschikbaarheid in het hele huis (zonder zelf een netwerk te hoeven aanleggen) als grootste voordeel.

[url=http://www.webwereld.nl/nieuws/11223.phtml]Het hele artikel[/url]

Het FreeBSD Gnome Team is klaar met het porten van Gnome2 naar FreeBSD. Dit houdt in dat Gnome2 eenvoudig vanuit de port geinstalleerd kan worden.
Het is zelfs de bedoeling om Gnome2 met FreeBSD 4.6 (die over 10 dagen uitkomt) mee te leveren.

[url=http://www.freebsd.org/gnome/newsflash.html]Het FreeBSD Gnome Team[/url]
[url=http://people.freebsd.org/~sobomax/gnome2.beta5.png]Screenshot[/url]

Bron: [url=http://www.pcworld.com/]PCWorld[/url]

Een research team van de ‘National Taiwan University’ melden dat ze een prototype hebben ontwikkeld van een optische disc die 100 GB aan informatie kan bevatten.

[quote]The 100GB disc is expected to become commercially available in 2004, when applications such as high-definition TV will create demand for larger storage capacities, said Din Ping Tsai, the professor at NTU who led the research team.
[/quote]

[url=http://www.pcworld.com/news/article/0,aid,100284,00.asp]Het hele artikel[/url]

Bron: [url=http://www.freebsd.org/support.html#mailing-list]FreeBSD Mailing Lists[/url]

Ik kreeg net 2 mailtjes met security bugs.

Mailtje 1

[quote]FreeBSD-SA-02:25 Security Advisory
The FreeBSD Project

Topic: bzip2 contains multiple security vulnerabilities

Category: core/ports
Module: bzip2
Announced: 2002-05-20
Credits: Volker Schmidt‚ Philippe Troin
Affects: FreeBSD 4.4-RELEASE‚ FreeBSD 4.5-RELEASE‚
FreeBSD 4.5-STABLE prior to the correction date.
bzip2 port prior to bzip2-1.0.2
Corrected: 2002-02-18 09:12:53 UTC (4.5-STABLE‚ RELENG_4)
2002-02-23 18:28:09 UTC (4.5-RELEASE-p1‚ RELENG_4_5)
2002-02-23 18:33:18 UTC (4.4-RELEASE-p8‚ RELENG_4_4)
2002-02-22 13:21:22 UTC (bzip2 port)
FreeBSD only: NO

I. Background

bzip2 is an advanced block-sorting file compression utility.

II. Problem Description

When creating a file during decompression‚ the bzip2 utility failed
to use the O_EXCL flag‚ potentially overwriting files without warning.
In addition‚ the bzip2 utility did not securely create new files
causing a race condition between creating the file and setting the
correct permissions.

When compressing a file pointed to by a symbolic link‚ the bzip2
utility incorrectly stored the permissions of the symbolic link
instead of the file. This may result in potentially lax file
permissions (rwxr-xr-x)‚ causing the decompressed file to be
world-readable.

bzip2 was incorporated into FreeBSD prior to FreeBSD 4.4-RELEASE.
Previous versions of FreeBSD did not contain bzip2 and are unaffected
unless bzip2 was installed from the ports collection or manually by
the system administrator.

III. Impact

1) Files may be inadvertently overwritten without warning.

2) Due to the race condition between creating files and setting proper
permissions‚ a local user may be able to read the contents of files
regardless of their intended permissions.

3) Decompressed files that were originally pointed to by a symbolic
link may end up with in incorrect permissions‚ allowing local users
to view their contents.

IV. Workaround

1) Deinstall the bzip2 port/package if you have it installed.

V. Solution

[FreeBSD 4.4 or 4.5 base system]

1) Upgrade your vulnerable system to 4.5-STABLE or the RELENG_4_4 or
RELENG_4_5 security branch dated after the respective correction dates.

2) To patch your present system‚ download the relevant patch from the
below location‚ and execute the following commands as root:

# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-02:25/bzip2.patch
# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-02:25/bzip2.patch.asc

Verify the detached PGP signature using your PGP utility.

This patch has been verified to apply to FreeBSD 4.4-RELEASE and
4.5-RELEASE.

# cd /usr/src
# patch -p < /path/to/patch # cd lib/libbz2 # make depend && make all install # cd ../../usr.bin/bzip2 # make depend && make all install 3) FreeBSD 4.4-RELEASE and 4.5-RELEASE systems: An experimental upgrade package is available for users who wish to provide testing and feedback on the binary upgrade process. This package may be installed on FreeBSD 4.4-RELEASE and 4.5-RELEASE systems only‚ and is intended for use on systems for which source patching is not practical or convenient. If you use the upgrade package‚ feedback (positive or negative) to security-officer@FreeBSD.org is requested so we can improve the process for future advisories. During the installation procedure‚ backup copies are made of the files which are replaced by the package. These backup copies will be reinstalled if the package is removed‚ reverting the system to a pre-patched state. # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/packages/SA-02.25/security-patch-bzip2-02.25.tgz # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/packages/SA-02.25/security-patch-bzip2-02.25.tgz.asc Verify the detached PGP signature using your PGP utility. # pkg_add security-patch-bzip2-02.25.tgz [ports] 1) Upgrade your entire ports collection and rebuild the bzip2 port. 2) Deinstall the old package and install a new package dated after the correction date‚ obtained from the following directories: [i386] ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/archivers/ ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/archivers/ [alpha] Packages are not automatically generated for the alpha architecture at this time due to lack of build resources. NOTE: It may be several days before updated packages are available. Be sure to check the file creation date on the package‚ because the version number of the software has not changed. 3) Download a new port skeleton for the bzip2 port from: http://www.freebsd.org/ports/ and use it to rebuild the port. 4) Use the portcheckout utility to automate option (3) above. The portcheckout port is available in /usr/ports/devel/portcheckout or the package can be obtained from: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-stable/Latest/portcheckout.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-5-current/Latest/portcheckout.tgz VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. [Ports collection] [/quote] Mailtje 2 [quote]FreeBSD-SA-02:24.k5su Security Advisory The FreeBSD Project Topic: k5su utility does not honor `wheel' group Category: kerberos5 Module: kerberos5/usr.bin/k5su Announced: 2002-05-20 Credits: jmallet@FreeBSD.org Affects: FreeBSD 4.4-RELEASE FreeBSD 4.5-RELEASE FreeBSD-STABLE prior to the correction date Corrected: 2002-05-15 12:51:30 UTC (RELENG_4) 2002-05-15 12:56:21 UTC (RELENG_4_5) 2002-05-15 13:04:00 UTC (RELENG_4_4) FreeBSD only: YES I. Background The k5su utility is a SU utility similar to su(1)‚ and is used to switch privileges after authentication using Kerberos 5 or the local passwd(5) file. k5su is installed as part of the `krb5' distribution‚ or when building from source with MAKE_KERBEROS5 set. Neither of these are default settings. II. Problem Description Historically‚ the BSD SU utility only allows users who are members of group `wheel' (group-ID 0) to obtain superuser privileges. The k5su utility‚ however‚ does not honor this convention and does not verify group membership if a user has successfully authenticated. k5su also lacks other features of su(1)‚ such as checking for password expiration‚ implementing login classes‚ and checking for the target user's login shell in /etc/shells. III. Impact Contrary to the expectations of many BSD system administrators‚ users not in group `wheel' may use k5su to attempt to obtain superuser privileges. Note that this would require knowledge of the root account password‚ or an explicit entry in the Kerberos 5 `.k5login' ACL for the root account. IV. Solution Remove the set-user-ID bit from the k5su utility: # chmod u-s /usr/bin/k5su This will completely disable k5su. Sites which wish to use Kerberos 5 authentication for SU and are comfortable with its limitations may choose to leave the set-user-ID bit enabled. As of the correction date‚ FreeBSD (including the upcoming 4.6-RELEASE) will install k5su if requested‚ but the set-user-ID bit will not be enabled by default. See also the ENABLE_SUID_K5SU option in make.conf(5). VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. [/quote]

Bron: [url=http://docs.freebsd.org]FreeBSD Mail Archive[/url]

[download]http://ftp.au.freebsd.org/pub/FreeBSD/releases/i386/4.6-RC2/[/download]

FreeBSD 4.6-RC2 is beschikbaar op alle ftp mirrors. Om het OS grondig te testen kan je [url=http://www.FreeBSD.org/releases/4.6R/qa.html]hierheen[/url] gaan.

[quote]The other mirrors should pick up the release soon. This candidate
fixes the sysinstall buffer truncation issue that prevented the
successful installation of GNOME with 4.6-RC1. There have been very
few other changes between the two releases‚ so bug reports against RC1
are still very much appreciated. Unless any other major issues crop
up before hand‚ we will release another RC in 5-7 days.
[/quote]

[url=http://docs.freebsd.org/cgi/getmsg.cgi?fetch=10276+0+current/freebsd-stable]Het hele artikel[/url]