Δεκέμβριος 2010 – Don't fear the penguin

Write a regular expression to match a MAC address. Go.

Take 1: ([0-9a-f]{2}:){5}[0-9a-f]{2}
Matches: 00:19:db:d0:8e:3c

Take 2: ([0-9a-fA-F]{1,2}[:-]){5}[0-9a-fA-F]{1,2}
Matches: 00-c-DB-a0-8E-f

RT @RedHatSummit: Let’s keep the excitement going! 🎉Join us in the Ecosystem Expo Hall to celebrate the general release of #RHEL8 https://t… 2 months ago

RT @hellasdirect: Best Workplace για μία ακόμη φορά η @hellasdirect στα φετινά βραβεία @GPTW_GR 😃 #rethink #BestWorkplaces #proud https://t… 3 months ago

Woohoo! Our copy of Ship It: The Game of Product Management by @PostlightStudio has arrived! Time to play and… twitter.com/i/web/status/1… 8 months ago

@Fosscomm2018 Το stream της αίθουσας Α2 δεν έχει ήχο, please fix 9 months ago

Thank you @hellasdirect for the love and wonderful #SysAdminDay surprise this morning! <3 photos.app.goo.gl/TNaxg1ZXiB3WjP… 12 months ago

Congrats @skaragiannis ! twitter.com/SpaceHellas/st… 1 year ago

RT @DevOpsGathering: It's time to say Goodbye ☹️ It was really a pleasure and fun meeting all of you! 💝🤓 Thank you especially to those who… 1 year ago

Thank you @DevOpsGathering for organising a great event! We really enjoyed it! #DOG18 https://t.co/5TV02bnNI0 1 year ago

A great first day with @DevOpsGathering #DOG18 https://t.co/vuHqsuJhck 1 year ago

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Linux Weekly News

Security updates for Tuesday

Security updates have been issued by Debian (libsdl2-image and libxslt), Oracle (java-1.8.0-openjdk and java-11-openjdk), Scientific Linux (java-1.8.0-openjdk and java-11-openjdk), SUSE (bzip2, microcode_ctl, and ucode-intel), and Ubuntu (clamav, evince, linux-hwe, linux-gcp, linux-snapdragon, and squid3).

ris

[$] 5.3 Merge window, part 2

At the end of the 5.3 merge window, 12,608 non-merge changesets had been pulled into the mainline repository. Nearly 6,000 of those were pulled after the first-half summary was written. As expected, there was still a lot of material yet to be merged for this development cycle.

corbet

Security updates for Monday

Security updates have been issued by Debian (bind9, exiv2, kernel, nss, openjdk-11, openjdk-8, patch, and squid3), Fedora (gvfs, libldb, and samba), Mageia (firefox, gvfs, libreswan, rdesktop, and thunderbird), openSUSE (bzip2, clementine, dbus-1, expat, fence-agents, firefox, glib2, kernel, kernel-firmware, ledger, libqb, libu2f-host, pam_u2f, libvirt, neov […]

ris

Kernel prepatch 5.3-rc1

Linus has released 5.3-rc1 and closed the merge window for this development cycle. "Anyway, despite the rocky start, and the big size, things mostly smoothed out towards the end of the merge window. And there's a lot to like in 5.3".

corbet

A crop of weekend stable kernel updates

Greg Kroah-Hartman has announced the release of the 5.2.2, 5.1.19, 4.19.60, 4.14.134, 4.9.186, and 4.4.186 stable kernels. As usual, they contain fixes throughout the kernel tree; users should upgrade.

jake

[$] Improving communities through documentation

Documentation, said Riona MacNamara at the beginning of her Open Source Summit Japan 2019 talk, is the superpower that we can use to energize users and developers; it is an important part of the creation of a vibrant and inclusive community. While there are a number of roadblocks that can impede participation in a development community, many of those can be […]

corbet

Security updates for Friday

Security updates have been issued by Debian (bzip2), Fedora (freetds, kernel, kernel-headers, and knot-resolver), openSUSE (bubblewrap, fence-agents, kernel, libqb, libu2f-host, pam_u2f, and tomcat), Oracle (vim), SUSE (kernel, LibreOffice, libxml2, and tomcat), and Ubuntu (libmspack and squid, squid3).

jake

Cook: security things in Linux v5.2

Over on his blog, Kees Cook runs through the security changes that came in Linux 5.2. "While the SLUB and SLAB allocator freelists have been randomized for a while now, the overarching page allocator itself wasn’t. This meant that anything doing allocation outside of the kmem_cache/kmalloc() would have deterministic placement in memory. This is bad both […]

jake

[$] Kernel analysis with bpftrace

At the 2019 Linux Storage, Filesystem, and Memory-Management Summit (LSFMM) Brendan Gregg gave a keynote on BPF observability that included a kernel issue he had debugged on Netflix production servers using bpftrace. In this article, he provides a crash course on bpftrace for kernel developers—to help them more easily analyze their code. Subscribers can read […]

jake

Security updates for Thursday

Security updates have been issued by Arch Linux (chromium, firefox, and squid), CentOS (thunderbird and vim), Debian (libonig), SUSE (firefox, glibc, kernel, libxslt, and tomcat), and Ubuntu (libreoffice and thunderbird).

jake

SANS Internet Storm Center

Verifying SSL/TLS configuration (part 1), (Tue, Jul 23rd) Ιουλίου 23, 2019

One of very important steps when performing penetration tests is to verify configuration of any SSL/TLS services. Specifically, the goal of this step is to check which protocols and ciphers are supported. This might sound easier than it is â€“ so this will be a series of diaries where I will try to explain how to verify configuration but also how t […]

ISC Stormcast For Tuesday, July 23rd 2019 https://isc.sans.edu/podcastdetail.html?id=6588, (Tue, Jul 23rd) Ιουλίου 23, 2019

Analyzing Compressed PowerShell Scripts, (Mon, Jul 22nd) Ιουλίου 22, 2019

Malicious document 1d5794e6b276db06f6f70d5fae6d718e contains VBA macros, as can be verified with oledump.py:

ISC Stormcast For Monday, July 22nd 2019 https://isc.sans.edu/podcastdetail.html?id=6586, (Mon, Jul 22nd) Ιουλίου 22, 2019

Malicious RTF Analysis CVE-2017-11882 by a Reader, (Sun, Jul 21st) Ιουλίου 21, 2019

This is a maldoc analysis submitted by reader Ahmed Elshaer.

Re-evaluating Network Security - It is Increasingly More Complex, (Sat, Jul 20th) Ιουλίου 20, 2019

I saw an interesting report [1] this week released last month (June 2019) by the Enterprise Strategy Group (ESG) about the increase complexity dealing with network security. The report highlights these three things:

Malicious PHP Script Back on Stage?, (Thu, Jul 18th) Ιουλίου 19, 2019

It&#x27s amazing how we can find old scripts coming back to life for some obscure reasons. If today, Powershell or JavaScript (and its derivations) are very common languages used to perform malicious actions, PHP remains also a good candidate. One of my hunting rules is to search for reversed PHP commands using the strrev() function. A few days ago I fou […]

ISC Stormcast For Friday, July 19th 2019 https://isc.sans.edu/podcastdetail.html?id=6584, (Fri, Jul 19th) Ιουλίου 19, 2019

The Other Side of Critical Control 1: 802.1x Wired Network Access Controls, (Thu, Jul 18th) Ιουλίου 18, 2019

Todayâ€™s story is a short how-to on implementing 802.1x authentication for wired switch ports.Â In other words, workstations have to authenticate to be allowed on the wired network (just like your wireless network should be configured).Â I was actually surprised to see 802.1x as part of the CIS Critical Control #1, where […]

ISC Stormcast For Thursday, July 18th 2019 https://isc.sans.edu/podcastdetail.html?id=6582, (Thu, Jul 18th) Ιουλίου 18, 2019

	Michail στη Ελληνικά ή Αγγλικά;
	adamo στη Ελληνικά ή Αγγλικά;
	Michail στη Ελληνικά ή Αγγλικά;
	Michail στη Ελληνικά ή Αγγλικά;
	cvi going distribute… στη version control for important…
	bilias στη It’s a girl!
	Sotiris Tsimbonis στη It’s a girl!
	kioan στη It’s a girl!
	kzorba στη It’s a girl!
	Sotiris Tsimbonis στη It’s a girl!

Μήνας: Δεκέμβριος 2010

Now we know where sudo reports

A regular expression to match MAC Addresses

IPv6 Certified Sage