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TOPIC: mod_security issue

mod_security issue 8 months 2 weeks ago #104396

  • oldgit
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I have just been creating a survey and have noticed that it has generated a large number of notifications from mod_security on my server. Luckily, I have my IP address whitelisted so I am not locked out. I am using the latest update of LimeSurvey and a pretty standard rule set on mod_sec.

One example of the notice follows...
[Sun Feb 02 14:32:19 2014] [error] [client xxx.xxx.xxx.xxx] ModSecurity: Access denied with code 406 (phase 2). Pattern match "(?:\\\\b(?:(?:type\\\\b\\\\W*?\\\\b(?:text\\\\b\\\\W*?\\\\b(?:j(?:ava)?|ecma|vb)|application\\\\b\\\\W*?\\\\bx-(?:java|vb))script|c(?:opyparentfolder|reatetextrange)|get(?:special|parent)folder|iframe\\\\b.{0,100}?\\\\bsrc)\\\\b|on(?:(?:mo(?:use(?:o(?:ver|ut)|down|move|up)|ve)| ..." at REQUEST_FILENAME. [file "/usr/local/apache/conf/modsec2.user.conf"] [line "117"] [id "1234123404"] [msg "Cross-site Scripting (XSS) Attack"] [data ".cookie"] [severity "CRITICAL"] [tag "WEB_ATTACK/XSS"] [hostname "www.my-domain.net"] [uri "/third_party/jquery-cookie/jquery.cookie.js"] [unique_id "Uu5W89XlWkcAAFrjdzsAAAAI"]
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mod_security issue 8 months 2 weeks ago #104483

  • DenisChenu
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Hi,

Did you use "Adanced setting"/ timer settings ?
If yes: can you deactivate it and test again ?

Denis
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mod_security issue 8 months 2 weeks ago #104508

  • oldgit
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DenisChenu wrote:
Hi,

Did you use "Adanced setting"/ timer settings ?

Denis

Thanks, Denis, for your response. I'm not sure where I would find these settings. Are they in mod_sec or LimeSurvey's admin area? Anyway, I have disabled that rule for this subdomain as I was getting just too many false positives.

Thanks again...
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mod_security issue 8 months 2 weeks ago #104612

  • DenisChenu
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Hi,

It's because i don't think we use /third_party/jquery-cookie/jquery.cookie.js in all survey.

Just need to find : when we use it and if it's with the last Yii version.

Maybe you can put a bug rem=port with a "really" little survey ?
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mod_security issue 7 months 1 week ago #106337

  • jelo
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DenisChenu wrote:
Hi,
It's because i don't think we use /third_party/jquery-cookie/jquery.cookie.js in all survey.

This ModSecure Rule [id "1234123404"] [msg "Cross-site Scripting (XSS) Attack"] is also triggered when just using the comfort updater.

It's not a problem of Limesurvey. The corerules ( spiderlabs.github.io/owasp-modsecurity-crs/ ) are containing this rule since years.

Perhaps the regex pattern is too broad or the jquery team would need to adapt some code.

Perhaps both are right and the administrator need to choose the rules casewise.
<LocationMatch /third_party/jquery-cookie/jquery.cookie.js>
  <IfModule mod_security2.c>
    SecRuleRemoveById 1234123404
    # SecRuleEngine Off
  </IfModule>
</LocationMatch>

There are a few ways to disable rules. www.modsecurity.org/documentation/
Last Edit: 4 months 4 weeks ago by c_schmitz.
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mod_security issue 5 months 6 hours ago #109116

  • elbaloo
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I'm not sure of following... so, just to be sure:
Is this an issue with LimeSurvey, with jQuery, or just with very strict rulesets?

I'm asking because my hosting provider blocked some IPs from where I was accessing the application and after submitted a support ticket they told me that they "relaxed the rule for the domain that was causing the issue" (mine).
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mod_security issue 4 months 4 weeks ago #109118

  • jelo
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The rule was disabled for your domain. My example above only disables the rule for the path of jquery. If you are on a shared hosting it is normal to disable the rule domain/account wise.

It is a false positive with this specific mod_security rule.
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