Hi,

On 01.03.2018 21:17, CAMPBELL Jeremy wrote:
> Karl,
> 
> You can create a group policy object in your Windows environment to delete 
> those keys.  That makes the problem go away.

to avoid that this is required i did some minor improvements to the
Firefox Detection-NVT which could help with the doubled detection of
Firefox installations where the registry entries are left behind.

Those changes arrived the feed once gb_firefox_detect_win.nasl has
reached Revision r9760.

Regards,

> Regards,
> Jeremy
> This message was classified PUBLIC by CAMPBELL Jeremy on Thursday, March 1, 
> 2018 at 3:17:16 PM.
> 
> From: Openvas-plugins [mailto:openvas-plugins-boun...@wald.intevation.org] On 
> Behalf Of Karl Fox
> Sent: Thursday, March 1, 2018 1:50 PM
> To: openvas-plugins@wald.intevation.org
> Subject: [Openvas-plugins] [openvas-Bugs][6942] gb_firefox_detect_win.nasl 
> gets wrong Mozilla Firefox version
> 
> Thank you for your response.
> 
> Yes, I understand that this issue is triggered because Firefox sloppily 
> leaves behind a registry entry when it uninstalls or upgrades, but Nessus, 
> for example, doesn't get tripped up by that, and there are thousands of 
> machines out there that will have these extraneous entries until the end of 
> time. Would it be possible to modify gb_firefox_detect_win.nasl to not make 
> this incorrect assumption? Perhaps check the uninstall hive to see if the 
> software is still actually installed?
> 
> Thanks,
> 
> Karl
> ---------- Forwarded message ---------
> From: <nore...@wald.intevation.org<mailto:nore...@wald.intevation.org>>
> Date: Thu, Mar 1, 2018 at 1:32 PM
> Subject: [openvas-Bugs][6942] gb_firefox_detect_win.nasl gets wrong Mozilla 
> Firefox version
> To: <nore...@wald.intevation.org<mailto:nore...@wald.intevation.org>>
> 
> 
> Bugs item #6942, was changed at 2018-01-25 20:17 by Christian Fischer
> You can respond by visiting:
> https://wald.intevation.org/tracker/?func=detail&atid=220&aid=6942&group_id=29
> 
>> Status: Closed
> Priority: 3
> Submitted By: Lithik Systems (lithik)
> Assigned to: Nobody (None)
> Summary: gb_firefox_detect_win.nasl gets wrong Mozilla Firefox version
> Architecture: 64 bits
> Product: OpenVAS
> Operating System: Linux
> Component: openvas-plugins
> Version: None
> Severity: normal
>> Resolution: Won't Fix
> Hardware: PC
> URL:
> 
> 
> Initial Comment:
> We have seen many 64-bit machines where OpenVAS throws up to dozens of 
> Mozilla Firefox (not ESR) vulnerabilities even though Firefox is in fact up 
> to date. We have tracked this down to what appears to be an incompletely 
> uninstalled 32-bit version of Firefox where the current 64-bit Firefox is 
> installed and running.
> 
> The following registry values remain:
> 
> HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\mozilla.org<http://mozilla.org> 
> (folder)
> HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\mozilla.org<http://mozilla.org>\Mozilla
>  (folder)
> HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\mozilla.org<http://mozilla.org>\Mozilla\CurrentVersion
>  (REG_SZ)
> 
> OpenVAS reports the value of CurrentVersion as being too old. No other fields 
> exist under the Wow6432Node\mozilla.org<http://mozilla.org> folder.
> 
> The following filesystem items remain:
> 
> C:\Program Files (x86)\Mozilla Firefox
> C:\Program Files (x86)\Mozilla Firefox\browser
> C:\Program Files (x86)\Mozilla Firefox\browser\defaults
> C:\Program Files (x86)\Mozilla Firefox\browser\defaults\preferences
> C:\Program Files (x86)\Mozilla 
> Firefox\browser\defaults\preferences\disable-autoupdate.js
> 
> No other files or folders exist under C:\Program Files (x86)\Mozilla Firefox
> 
> The folder C:\Program Files\Mozilla Firefox exists and contains a complete 
> and current Firefox installation.
> 
> The registry value 
> HKEY_LOCAL_MACHINE\SOFTWARE\mozilla.org<http://mozilla.org>\Mozilla\CurrentVersion
>  exists and contains the version number of the current Firefox installation.
> 
> If I remove the old registry entry, OpenVAS does not report false positives. 
> But I continue to run into hundreds of machines with this problem. Perhaps 
> gb_firefox_detect_win.nasl can be made to avoid this false positive.
> 
> In the specific case I am using for this report, the uninstalled version is 
> 44.0.2 and the currently installed version is 56.0.2.
> 
> ----------------------------------------------------------------------
> 
>> Comment By: Christian Fischer (cfi)
> Date: 2018-03-01 18:32
> 
> Message:
> Hi,
> 
> thanks for your report. Please note that this bugtracker is abandoned and 
> issues related to NVTs are better placed at 
> https://lists.wald.intevation.org/pipermail/openvas-plugins/
> 
> Firefox itself is known to leave traces like this behind causing some 
> possible false detections. See e.g. 
> https://lists.wald.intevation.org/pipermail/openvas-discuss/2018-January/011748.html
>  for some background.
> 
> For now i'm closing this as the false detection will go away once the Firefox 
> upgrade routines are correctly doing its job or the targets registry is 
> cleaned up from such traces.
> 
> Suggestions to improve the situation or even patches are still welcome at the 
> mentioned openvas-plugins mailing list.
> 
> ----------------------------------------------------------------------
> 
> You can respond by visiting:
> https://wald.intevation.org/tracker/?func=detail&atid=220&aid=6942&group_id=29
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-- 

Christian Fischer | PGP Key: 0x54F3CE5B76C597AD
Greenbone Networks GmbH | http://greenbone.net
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Geschäftsführer: Lukas Grunwald, Dr. Jan-Oliver Wagner
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