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Call: 530-895-2925

Visit: Learning Resource Center (LRC) 120

Faculty and Staff:


Call: 530-895-2888

Visit: Learning Resource Center (LRC) 120

IT System Status


Security Bulletin

Butte College takes internet security seriously. This bulletin has information on current issues, vulnerabilities, and recommendations to minimize the risk of a security breach.

March 5, 2015 - Zip File Email Attachment Policy Change

In an effort to mitigate the spread of viruses and campus-generated spam, the following warning messages will be prepended to any email that has a .zip attachment or executable content. While not all content in .zip attachments is harmful, dropping malicious content into a .zip and then attaching it to an email is an easy way for attackers to spread viruses. Oftentimes the email message is believable enough to fool the recipient into clicking and installing the content in a .zip, or following instructions in a password protected .zip. This leads to infected machines and compromised accounts, and puts the district at risk for data theft and improper access to confidential data.

For the past month, we have been assessing the volume and nature of campus email that include .zip attachments. There is a reasonable amount of legitimate business that is transacted with .zip attachments, so we are opting for this strategy rather than blocking .zip attachments. These warning messages will serve as a caution for users who receive a potentially malicious email before we are able to assess and implement a block for that specific email should it be determined to be malicious.

We have tested these warnings on a variety of devices and mail clients with success, and this action is negligible in system or account impact, and in no way interferes with the delivery of the original message.

A message that contains an executable attachment or .zip containing an executable will have the following warning message prepended to the body of the email. Not all executable content is viral in nature—this message purely serves as a warning.


WARNING--This message contains a .zip attachment. Zip files can contain viruses--open with caution.
If you were not expecting this message, even if sent from someone you know, contact the sender to verify its validity.
Delete this message if it is not valid.
Butte College IT Services and Support
Students: 530-895-2525 Faculty & Staff: 530-895-2888

April 28, 2014 - Internet Explorer Security Vulnerability

Microsoft has discovered a vulnerability in all versions of Internet Explorer. If your system is attacked, the attacker could take complete control of your system.


If at all possible, do not use Internet Explorer. Google Chrome, Mozilla Firefox, Safari and Opera are all unaffected by this vulnerability. For work where Internet Explorer is required, perform the following steps:

Set Internet and Local intranet security zone settings to "High"

To raise the browsing security level in Internet Explorer, perform the following steps:
  1. On the Internet Explorer Tools menu, click Internet Options.
  2. In the Internet Options dialog box, click the Security tab, and then click Internet.
  3. Under Security level for this zone, move the slider to High. This sets the security level for all websites you visit to High.
  4. Click Local intranet.
  5. Under Security level for this zone, move the slider to High. This sets the security level for all websites you visit to High.
  6. Click OK to accept the changes and return to Internet Explorer.

Note If no slider is visible, click Default Level, and then move the slider to High.

Note Setting the level to High may cause some websites to work incorrectly. If you have difficulty using a website after you change this setting, and you are sure the site is safe to use, you can add that site to your list of trusted sites. This will allow the site to work correctly even with the security setting set to High.

If you have any questions or concerns, please contact User Support Services.

Butte College | 3536 Butte Campus Drive, Oroville CA 95965 | General Information 530.895.2511

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