Security issue

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teppIes
Posts: 6
Joined: Fri Aug 03, 2018 1:20 pm

Security issue

Post by teppIes » Fri Aug 03, 2018 1:23 pm

Wait
Last edited by teppIes on Fri Aug 03, 2018 11:43 pm, edited 2 times in total.

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orlaisadog
Posts: 167
Joined: Thu May 31, 2018 11:12 am
Location: Bristol, England

Re: Security issue

Post by orlaisadog » Fri Aug 03, 2018 1:38 pm

Also lidnariq (that was me)

Revenant
Posts: 441
Joined: Sat Apr 25, 2015 1:47 pm
Location: FL

Re: Security issue

Post by Revenant » Fri Aug 03, 2018 1:44 pm

Image

I have a hard time believing that this would actually fool anybody.

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orlaisadog
Posts: 167
Joined: Thu May 31, 2018 11:12 am
Location: Bristol, England

Re: Security issue

Post by orlaisadog » Fri Aug 03, 2018 1:50 pm

You have a different font to me :D
Attachments
Screenshot_20180803-214924.jpg

Revenant
Posts: 441
Joined: Sat Apr 25, 2015 1:47 pm
Location: FL

Re: Security issue

Post by Revenant » Fri Aug 03, 2018 1:59 pm

Even so, I can't see an account with a single-digit post count and a 2018 registration date somehow successfully impersonating one of the site admins (or lidnariq, who registered a decade ago and has over 7,000 posts) long enough to actually accomplish anything.

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orlaisadog
Posts: 167
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Location: Bristol, England

Re: Security issue

Post by orlaisadog » Fri Aug 03, 2018 2:06 pm

I would think that no one really looks at the stats. I'd expect most people just glance at the profile picture.

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rainwarrior
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Re: Security issue

Post by rainwarrior » Fri Aug 03, 2018 2:10 pm

You don't need special rules for l vs I, there are a lot of ways to impersonate someone's account name. Mods can just ban people for doing that, this is not a security issue.

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Dwedit
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Re: Security issue

Post by Dwedit » Fri Aug 03, 2018 2:52 pm

Font is set to "Lucida Grande", Verdana, Helvetica, Arial, sans-serif;
So if you actually have Lucida Grande, or don't have Verdana, you get a capless I.

Meanwhile, the Post font is set to "Lucida Grande", "Trebuchet MS", Helvetica, Arial, sans-serif;
Trebuchet MS has the distinctive slanted M character, and a capless I.
Here come the fortune cookies! Here come the fortune cookies! They're wearing paper hats!

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orlaisadog
Posts: 167
Joined: Thu May 31, 2018 11:12 am
Location: Bristol, England

Re: Security issue

Post by orlaisadog » Fri Aug 03, 2018 11:37 pm

It's still an issue. Can I get permission from a user with a (lowercase) L in their username and a moderator to see how many people I can fool by doing this and see if it needs to be changed? I have one but it would work better to use someone else's.

teppIes
Posts: 6
Joined: Fri Aug 03, 2018 1:20 pm

Re: Security issue

Post by teppIes » Fri Aug 03, 2018 11:43 pm

What about this?
Hello. I seem to have lost my admin rights as my name isn't red anymore. Please can they be restored? Thank you

(deletes all forum posts and replaces them with spam)

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rainwarrior
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Re: Security issue

Post by rainwarrior » Fri Aug 03, 2018 11:57 pm

orlaisadog wrote:It's still an issue. Can I get permission from a user with a (lowercase) L in their username and a moderator to see how many people I can fool by doing this and see if it needs to be changed? I have one but it would work better to use someone else's.
Why do you think this is an experiment that needs to be undertaken? What do you think we need to know about this that we don't already?

Revenant
Posts: 441
Joined: Sat Apr 25, 2015 1:47 pm
Location: FL

Re: Security issue

Post by Revenant » Sat Aug 04, 2018 12:23 am

teppIes wrote:What about this?
Hello. I seem to have lost my admin rights as my name isn't red anymore. Please can they be restored? Thank you

(deletes all forum posts and replaces them with spam)
Which of the two other admins on this forum do you think are stupid enough to fall for this?

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Banshaku
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Re: Security issue

Post by Banshaku » Sat Aug 04, 2018 2:13 am

Since we know the admin for ages and know their writing pattern, this is not something that would happens. For a new bbs this is a different story but for here there is not much to be concerned about.

tepples
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Re: Security issue

Post by tepples » Sat Aug 04, 2018 5:43 am

This post is cryptic, I admit. It's intended to hint to the "guilty" party that we're on to you, while the impostor account's post count is still low, without causing too much disruption otherwise.
All users can see join dates and post counts, and with an appropriate font, capital I isn't a homoglyph.<br />Firefox ESR 52 in Debian 9, with Wine (and the MS Core Fonts) installed
All users can see join dates and post counts, and with an appropriate font, capital I isn't a homoglyph.
Firefox ESR 52 in Debian 9, with Wine (and the MS Core Fonts) installed
postcount.png (4.67 KiB) Viewed 8388 times
The comment section of Explosm.net allows setting "badges" on users, and the Discord chat platform allows setting "roles" on users. Both have been used to distinguish a regular from a homoglyph impostor. The counterpart in phpBB is the "special rank", which this board mostly uses for name change notices.

Without giving too much away: We have set phpBB to store some information about where each post came from, on the basis of legitimate interest in preventing and curing abuse. There exist ways to evade the measures we have in place, but I don't think it's quite bad enough yet to have to install stylometry software to guess identity based on writing style. Stylometry probably wouldn't do a good job anyway in the face of misattribution due to mistaken quoting markup.

Now how would you think to imitate my writing style?

teppIes
Posts: 6
Joined: Fri Aug 03, 2018 1:20 pm

Re: Security issue

Post by teppIes » Sat Aug 04, 2018 11:59 am

Revenant wrote:
teppIes wrote:What about this?
Hello. I seem to have lost my admin rights as my name isn't red anymore. Please can they be restored? Thank you

(deletes all forum posts and replaces them with spam)
Which of the two other admins on this forum do you think are stupid enough to fall for this?
I'm not saying anyone is stupid. I would fall for this.

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