- WLUG - wlug.mailman3.com

HOWTO create ISO that is both BIOS and UEFI bootable
by Andy Stewart 11 Nov '17

11 Nov '17

Hi everybody, I've noticed that the Ubuntu 16.04 ISO is bootable on systems with BIOS as well as UEFI. From scratch, I've remastered Ubuntu, but my ISO file is only bootable via BIOS. I'd like to remedy that situation by figuring out what magic is needed so that my ISO file can be booted either way. I have a chroot directory in which my files live. I have scripts that convert all of that into an ISO file. My guess is that I need a new/modified incantation of mkisofs plus some additional files for UEFI. Despite a lot of searching, I've not yet found the info that I need. If you have definitive information, please let me know. Thanks! Andy -- Andy Stewart (KB1OIQ) Founder: Worcester Linux Users' Group Founder: Chelmsford Linux Meetup Group President: PART of Westford, MA (WB1GOF)

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Linux Admin/kernel contract opening in MA
by John Spencer 09 Nov '17

09 Nov '17

We have a client in the Lowell, MA area with a 6-12 month contract opening for a Linux Admin/Linux kernel engineer. My client needs someone who has experience with Linux admin, building Linux kernel and modules. Must be able to configure the kernel and manage Linux build environment Must have experience setting up repository mirrors Must have set up regression test environments Please call or email me with if you are interested or have any questions. Regards, John Spencer Connected Systems Partners Office: (978) 455-5550 x208 Cell: (978) 621-9743 jspencer(a)connectedsp.com www.connectedsp.com GET CONNECTED! All information in this email, unless indicated otherwise in the body of the email, is considered confidential and intended for the view and use of the recipient(s) only.

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Re: [Wlug] Reminder: Meeting Nov. 9th 2017: Location: WPI Student Center Rm 331
by Robert Schwein 09 Nov '17

09 Nov '17

Stuck in Ohio. Darn. I would have liked to have heard about that 3D printer/software. Bob On Wed, Nov 8, 2017 at 9:34 PM, Tim Keller <turbofx(a)gmail.com> wrote: > Hey Gang, > > We've got a meeting, tomorrow night. > > Location: WPI Mid Century Rm 331. > Time: 7pm > Subject: 3d Printing FOSS software. > > I'll be doing a quick talk about software that I've been using to > interface with my 3d printer. > I *might* bring the printer... I'm currently having some electrical issues > with it... but in either case I can give a quick demo of FreeCAD and Cura. > > As usual, there will be snacks and refreshments and then we'll head down > to Tech for pizza. > > Thanks, > Tim. > > -- > I am leery of the allegiances of any politician who refers to their > constituents as "consumers". > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug > >

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Reminder: Meeting Nov. 9th 2017: Location: WPI Student Center Rm 331
by Tim Keller 09 Nov '17

09 Nov '17

Hey Gang, We've got a meeting, tomorrow night. Location: WPI Mid Century Rm 331. Time: 7pm Subject: 3d Printing FOSS software. I'll be doing a quick talk about software that I've been using to interface with my 3d printer. I *might* bring the printer... I'm currently having some electrical issues with it... but in either case I can give a quick demo of FreeCAD and Cura. As usual, there will be snacks and refreshments and then we'll head down to Tech for pizza. Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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WLUG meeting Nov. 9th 2017! Location: WPI Mid Century Room 331
by Tim Keller 06 Nov '17

06 Nov '17

Hey Gang, Sorry for the short notice! We've got a meeting on Thursday! Topic: We'll, I'm in the midst of building a 3d printer! I *might* have it done for Thursday! I've done a lot of talking lately, but if people are interested, I've managed "figure" out freecad for the most part. Is this something people are interested in or does someone else have something they'd like to talk about. Location: WPI Mid-Century Room 331 As usual snacks and refreshments will be provided. Thanks, Tim. -- I am leery of the allegiances of any politician who refers to their constituents as "consumers".

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Re: [Wlug] Major WPA2 Vulnerability
by Chuck Anderson 18 Oct '17

18 Oct '17

On Wed, Oct 18, 2017 at 02:29:56PM -0400, Keith Wright wrote: > This is very embarrassing for the authors of the > standard, but is it really a big problem? Several > meetings ago, somebody brought a device to the > WLUG meeting that, as I understood it, pretends > to be a wireless router and interposes itself > into any nearby connection. If things like that > exist, why care about encryption vulnerability? Because with properly configured wireless and patched clients, you can be sure you are connecting to the trusted network, not a Man-in-the-Middle. It requires mutual authentication, which happens for example on the WPI wireless network by using EAP-TLS certificates. The client is supposed to verify the server's certificate and the server of course verifies the client's certificate. Unfortunately, most networks don't use EAP but rather use Pre-Shared Keys (WPA2-PSK). > If you need to patch both sides to be secure, > then you are not secure in the coffee shop no > matter what you do. In any case, if you are > using the wireless to connect to a web site > or "cloud" server, then the wireless connection > is the least of your insecurities. In the strictest sense this is true, but as far as the KRACK attack goes, the wireless AP side is much less likely to be a problem, because the vulnerabilities are in parts of the standards that are not often used (802.11r "Fast Roaming" for example). The client-side vulnerabilities, especially in Linux/Android, are much more serious. On Linux, the client can be tricked into using a null session key. However, in a coffee shop KRACK is moot because most coffee shops don't use encryption at all to begin with. In any case, WPI's recommendation to use the VPN if you are not sure of your device's or the network's immunity to KRACK is sound, because even if there was a M-i-t-M, they still would not be able to decrypt the VPN traffic. Security is helpful in layers. Belt-and-suspenders.

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Re: [Wlug] Major WPA2 Vulnerability
by Keith Wright 18 Oct '17

18 Oct '17

"Sweetser, Frank E" <fs(a)WPI.EDU> writes: > Nothing so simple, unfortunately. This class of vulnerability is > actually a collection of 10 CVEs, which encompass both the AP side and > client side. If you've patched the AP side, for example, the attacker > may still be able to compromise the set of session keys on the client > side, and decrypt all of the client sent traffic. > You've got to patch both sides to be fully secure. You've got to avoid computers to be fully secure. But let's not get that paranoid. I pulled Cat 5 cable through the house years ago and never use wireless, but WPI has its hair on fire, and sent Professor Diane email (through Microsoft cloud service) to install "upgrades" immediately. I told her to at least wait until she has her computer back in the office and plugged into WPI cable. I have a friend who has been without a computer for a month or two because he tried to upgrade firmware and could not re-boot. This is very embarrassing for the authors of the standard, but is it really a big problem? Several meetings ago, somebody brought a device to the WLUG meeting that, as I understood it, pretends to be a wireless router and interposes itself into any nearby connection. If things like that exist, why care about encryption vulnerability? If you need to patch both sides to be secure, then you are not secure in the coffee shop no matter what you do. In any case, if you are using the wireless to connect to a web site or "cloud" server, then the wireless connection is the least of your insecurities. -- Keith

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Re: [Wlug] Major WPA2 Vulnerability
by Sweetser, Frank E 16 Oct '17

16 Oct '17

Nothing so simple, unfortunately. This class of vulnerability is actually a collection of 10 CVEs, which encompass both the AP side and client side. If you've patched the AP side, for example, the attacker may still be able to compromise the set of session keys on the client side, and decrypt all of the client sent traffic. You've got to patch both sides to be fully secure. """ The direction in which packets can be decrypted (and possibly forged) depends on the handshake being attacked. Simplified, when attacking the 4-way handshake, we can decrypt (and forge) packets sent by the client. When attacking the Fast BSS Transition (FT) handshake, we can decrypt (and forge) packets sent towards the client. Finally, most of our attacks also allow the replay of unicast, broadcast, and multicast frames. For further details, see Section 6 of our research paper<https://www.krackattacks.com/#paper>. """ Frank Sweetser Director of Network Operations Worcester Polytechnic Institute "For every problem, there is a solution that is simple, elegant, and wrong." - HL Mencken ________________________________ From: wlug-bounces(a)mail.wlug.org <wlug-bounces(a)mail.wlug.org> on behalf of Theo Van Dinter <felicity(a)kluge.net> Sent: Monday, October 16, 2017 3:30 PM To: Worcester Linux Users Group Subject: Re: [Wlug] Major WPA2 Vulnerability fwiw, my understanding is that the vulnerability is on the client side. therefore, I'm not sure what patches would get applied to an access point, though presumably if you use bridging (and maybe extension?) functionality then maybe there's an issue there. iow, I think patching access points isn't necessary or at least is a low priority if you're not using a feature that turns the device into a client. """ What if there are no security updates for my router? Our main attack is against the 4-way handshake, and does not exploit access points, but instead targets clients. So it might be that your router does not require security updates. We strongly advise you to contact your vendor for more details. In general though, you can try to mitigate attacks against routers and access points by disabling client functionality (which is for example used in repeater modes) and disabling 802.11r (fast roaming). For ordinary home users, your priority should be updating clients such as laptops and smartphones. """ On Mon, Oct 16, 2017 at 3:21 PM, Michael C Voorhis <mvoorhis(a)cs.wpi.edu<mailto:mvoorhis@cs.wpi.edu>> wrote: Chuck Anderson writes: > Because none of Fedora's updates aren't actually released yet. They > are built and undergoing pushing/testing now, but being a public > distro, anyone can get them if they know where to look: Ubuntu released a bunch of WPA-related patches a little after noontime today, it appears. John Stoffel: > I'm using DD-WRT on my APs at home, but god do the web pages and > forums suck for actually figuring out what version to run and > whether it's patched or not. Sigh... Ditto for OpenWRT, it appears the project is still alive, but you'd never know, looking at their website. I may switch to LEDE, which confusingly appears to be a fork of OpenWRT which is trying to merge back with OpenWRT....? --MCV. _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org<mailto:Wlug@mail.wlug.org> http://mail.wlug.org/mailman/listinfo/wlug

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Re: [Wlug] Major WPA2 Vulnerability
by Theo Van Dinter 16 Oct '17

16 Oct '17

fwiw, my understanding is that the vulnerability is on the client side. therefore, I'm not sure what patches would get applied to an access point, though presumably if you use bridging (and maybe extension?) functionality then maybe there's an issue there. iow, I think patching access points isn't necessary or at least is a low priority if you're not using a feature that turns the device into a client. """ What if there are no security updates for my router? Our main attack is against the 4-way handshake, and does not exploit access points, but instead targets clients. So it might be that your router does not require security updates. We strongly advise you to contact your vendor for more details. In general though, you can try to mitigate attacks against routers and access points by disabling client functionality (which is for example used in repeater modes) and disabling 802.11r (fast roaming). For ordinary home users, your priority should be updating clients such as laptops and smartphones. """ On Mon, Oct 16, 2017 at 3:21 PM, Michael C Voorhis <mvoorhis(a)cs.wpi.edu> wrote: > Chuck Anderson writes: > > Because none of Fedora's updates aren't actually released yet. They > > are built and undergoing pushing/testing now, but being a public > > distro, anyone can get them if they know where to look: > > Ubuntu released a bunch of WPA-related patches a little after noontime > today, it appears. > > John Stoffel: > > I'm using DD-WRT on my APs at home, but god do the web pages and > > forums suck for actually figuring out what version to run and > > whether it's patched or not. Sigh... > > Ditto for OpenWRT, it appears the project is still alive, but you'd > never know, looking at their website. I may switch to LEDE, which > confusingly appears to be a fork of OpenWRT which is trying to merge > back with OpenWRT....? > > --MCV. > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

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Re: [Wlug] Major WPA2 Vulnerability
by thinkbrown＠gmail.com 16 Oct '17

16 Oct '17

wpa_supplicant got an update pushed to the Arch repos at around 11AM too (if anybody else here uses Arch) On Oct 16, 2017 15:23, "Michael C Voorhis" <mvoorhis(a)cs.wpi.edu> wrote: Chuck Anderson writes: > Because none of Fedora's updates aren't actually released yet. They > are built and undergoing pushing/testing now, but being a public > distro, anyone can get them if they know where to look: Ubuntu released a bunch of WPA-related patches a little after noontime today, it appears. John Stoffel: > I'm using DD-WRT on my APs at home, but god do the web pages and > forums suck for actually figuring out what version to run and > whether it's patched or not. Sigh... Ditto for OpenWRT, it appears the project is still alive, but you'd never know, looking at their website. I may switch to LEDE, which confusingly appears to be a fork of OpenWRT which is trying to merge back with OpenWRT....? --MCV. _______________________________________________ Wlug mailing list Wlug(a)mail.wlug.org http://mail.wlug.org/mailman/listinfo/wlug

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