[Bug 1103965] [NEW] cannot update security

[Launchpad Bug Tracker]

*** This bug is a security vulnerability ***

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Can't install programs in terminal
Sorry, command-not-found has crashed! Please file a bug report at: https://bugs.launchpad.net/command-not-found/+filebug Please include the following information with the report:  command-not-found version: 0.2.44
When I update the system, this shows:
W:Failed to fetch http://deb.torproject.org/torproject.org/dists/precise/InRelease  Unable to find expected entry 'main]/source/Sources' in Release file (Wrong sources.list entry or malformed file)
During update in terminal 
 E:Some index files failed to download. They have been ignored, or old ones used instead.
Cannot access the user accounts window, appears for 1 second and disappears.
security updates don't work.

** Affects: command-not-found (Ubuntu)
     Importance: Undecided
         Status: New

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cannot update security
https://bugs.launchpad.net/bugs/1103965
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