Twitter to All Users: Change Your Password Now!



  • Twitter just asked all 300+ million users to reset their passwords, citing the exposure of user passwords via a bug that stored passwords in plain text — without protecting them with any sort of encryption technology that would mask a Twitter user’s true password. The social media giant says it has fixed the bug and that so far its investigation hasn’t turned up any signs of a breach or that anyone misused the information. But if you have a Twitter account, please change your account password now.

    Or if you don’t trust links in blogs like this (I get it) go to Twitter.com and change it from there. And then come back and read the rest of this. We’ll wait.

    In a post to its company blog this afternoon, Twitter CTO Parag Agrawal wrote:

    “When you set a password for your Twitter account, we use technology that masks it so no one at the company can see it. We recently identified a bug that stored passwords unmasked in an internal log. We have fixed the bug, and our investigation shows no indication of breach or misuse by anyone.

    A message posted this afternoon (and still present as a pop-up) warns all users to change their passwords.

    “Out of an abundance of caution, we ask that you consider changing your password on all services where you’ve used this password. You can change your Twitter password anytime by going to the password settings page.”

    Agrawal explains that Twitter normally masks user passwords through a state-of-the-art encryption technology called “bcrypt,” which replaces the user’s password with a random set of numbers and letters that are stored in Twitter’s system.

    “This allows our systems to validate your account credentials without revealing your password,” said Agrawal, who says the technology they’re using to mask user passwords is the industry standard.

    “Due to a bug, passwords were written to an internal log before completing the hashing process,” he continued. “We found this error ourselves, removed the passwords, and are implementing plans to prevent this bug from happening again.”

    Agrawal wrote that while Twitter has no reason to believe password information ever left Twitter’s systems or was misused by anyone, the company is still urging all Twitter users to reset their passwords NOW.

    A letter to all Twitter users posted by Twitter CTO Parag Agrawal

    Twitter advises:
    -Change your password on Twitter and on any other service where you may have used the same password.
    -Use a strong password that you don’t reuse on other websites.
    -Enable login verification, also known as two factor authentication. This is the single best action you can take to increase your account security.
    -Use a password manager to make sure you’re using strong, unique passwords everywhere.

    This may be much ado about nothing disclosed out of an abundance of caution, or further investigation may reveal different findings. It doesn’t matter for right now: If you’re a Twitter user and if you didn’t take my advice to go change your password yet, go do it now! That is, if you can.

    Twitter.com seems responsive now, but some period of time Thursday afternoon Twitter had problems displaying many Twitter profiles, or even its homepage. Just a few moments ago, I tried to visit the Twitter CTO’s profile page and got this (ditto for Twitter.com):

    What KrebsOnSecurity and other Twitter users got when we tried to visit twitter.com and the Twitter CTO’s profile page late in the afternoon ET on May 3, 2018.

    If for some reason you can’t reach Twitter.com, try again soon. Put it on your to-do list or calendar for an hour from now. Seriously, do it now or very soon.

    And please don’t use a password that you have used for any other account you use online, either in the past or in the present. A non-comprehensive list (note to self) of some password tips are here.

    I have sent some more specific questions about this incident in to Twitter. More updates as available.

    https://krebsonsecurity.com/2018/05/twitter-to-all-users-change-your-password-now/





Tmux Commands

screen and tmux

A comparison of the features (or more-so just a table of notes for accessing some of those features) for GNU screen and BSD-licensed tmux.

The formatting here is simple enough to understand (I would hope). ^ means ctrl+, so ^x is ctrl+x. M- means meta (generally left-alt or escape)+, so M-x is left-alt+x

It should be noted that this is no where near a full feature-set of either group. This - being a cheat-sheet - is just to point out the most very basic features to get you on the road.

Trust the developers and manpage writers more than me. This document is originally from 2009 when tmux was still new - since then both of these programs have had many updates and features added (not all of which have been dutifully noted here).

Action tmux screen
start a new session tmux OR
tmux new OR
tmux new-session
screen
re-attach a detached session tmux attach OR
tmux attach-session
screen-r
re-attach an attached session (detaching it from elsewhere) tmux attach -d OR
tmux attach-session -d
screen -dr
re-attach an attached session (keeping it attached elsewhere) tmux attach OR
tmux attach-session
screen -x
detach from currently attached session ^b d OR
^b :detach
^a ^d OR
^a :detach
rename-window to newname ^b , <newname> OR
^b :rename-window <newn>
^a A <newname>
list windows ^b w ^a w
list windows in chooseable menu ^a "
go to window # ^b # ^a #
go to last-active window ^b l ^a ^a
go to next window ^b n ^a n
go to previous window ^b p ^a p
see keybindings ^b ? ^a ?
list sessions ^b s OR
tmux ls OR
tmux list-sessions
screen -ls
toggle visual bell ^a ^g
create another window ^b c ^a c
exit current shell/window ^d ^d
split window/pane horizontally ^b " ^a S
split window/pane vertically ^b % ^a |
switch to other pane ^b o ^a <tab>
kill the current pane ^b x OR (logout/^D)
collapse the current pane/split (but leave processes running) ^a X
cycle location of panes ^b ^o
swap current pane with previous ^b {
swap current pane with next ^b }
show time ^b t
show numeric values of panes ^b q
toggle zoom-state of current pane (maximize/return current pane) ^b z
break the current pane out of its window (to form new window) ^b !
re-arrange current panels within same window (different layouts) ^b [space]
Kill the current window (and all panes within) ^b killw [target-window]
  • Make ISO from DVD

    In this case I had an OS install disk which was required to be on a virtual node with no optical drive, so I needed to transfer an image to the server to create a VM

    Find out which device the DVD is:

    lsblk

    Output:

    NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 465.8G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 464.8G 0 part ├─centos-root 253:0 0 50G 0 lvm / ├─centos-swap 253:1 0 11.8G 0 lvm [SWAP] └─centos-home 253:2 0 403G 0 lvm /home sdb 8:16 1 14.5G 0 disk /mnt sr0 11:0 1 4.1G 0 rom /run/media/rick/CCSA_X64FRE_EN-US_DV5

    Therefore /dev/sr0 is the location , or disk to be made into an ISO

    I prefer simplicity, and sometimes deal with the fallout after the fact, however Ive repeated this countless times with success.

    dd if=/dev/sr0 of=win10.iso

    Where if=Input file and of=output file

    I chill out and do something else while the image is being copied/created, and the final output:

    8555456+0 records in 8555456+0 records out 4380393472 bytes (4.4 GB) copied, 331.937 s, 13.2 MB/s

    Fin!

    read more
  • Recreate postrgresql database template encode to ASCII

    UPDATE pg_database SET datistemplate = FALSE WHERE datname = 'template1';

    Now we can drop it:

    DROP DATABASE template1;

    Create database from template0, with a new default encoding:

    CREATE DATABASE template1 WITH TEMPLATE = template0 ENCODING = 'UNICODE'; UPDATE pg_database SET datistemplate = TRUE WHERE datname = 'template1'; \c template1 VACUUM FREEZE;

    read more
});