From the low-hanging-fruit-department
QuickHeal Generic Malformed Archive Bypass (ZIP GP ________________________________________________________________________
From the low-hanging-fruit-department
QuickHeal Generic Malformed Archive Bypass (ZIP GPFLAG)
________________________________________________________________________
Release mode : Silent Patch
Ref : [TZO-20-2020] - Quickheal Malformed Archive bypass
(ZIP GPFLAG)
Vendor : Quickheal
Status : Patched
CVE :
Dislosure Policy: https://caravelahq.com/b/policy/20949
Blog : http://blog.zoller.lu/2009/04/case-for-av-bypassesevasions.html
Link to more information:
https://blog.zoller.lu/p/tzo-20-2020-quickheal-malformed-archive.html
Vendor Advisory : No Advisory issued, customers not informed.
Affected Products
=================
Quick Heal Total Security - VDB lower than 28 November, 2019
Quick Heal Home Security - VDB lower than 28 November, 2019
Quick Heal Total Security Multi-Device - VDB lower than 28 November, 2019
Quick Heal Internet Security - VDB lower than 28 November, 2019
Quick Heal Total Security for Mac - VDB lower than 28 November, 2019
Quick Heal AntiVirus Pro - VDB lower than 28 November, 2019
Quick Heal AntiVirus for Server - VDB lower than 28 November, 2019
Quick Heal Total Security for Android - VDB lower than 28 November, 2019
Enterprise versions :
- Unknown
I. Background
=================
"Over a span of 26 years the company's R&D has focused on computer and
network security solutions. The current portfolio of cloud-based
security and advanced machine learning enabled solutions stop threats,
attacks and malicious traffic before it strikes. This considerably
reduces the system resource usage. The security solutions are
indigenously developed in India. Quick Heal Antivirus Solutions, Quick
Heal Scan Engine and the entire range of Quick Heal products are
proprietary items of Quick Heal Technologies Ltd. (Formerly Known as
Quick Heal Technologies Pvt. Ltd.)"
II. Description
=================
The parsing engine supports the ZIP archive format. The parsing engine
can be bypassed by specifically manipulating an ZIP Archive (GPFLAG) so
that it can be accessed by an end-user but not the Anti-Virus software.
The AV engine is unable to scan the archive and issues the file a
"clean" rating.
I may release further details after all known vulnerable vendors have
patched their products.
III. Impact
=================
Impacts depends on the contextual use of the product and engine within
the organisation of a customer. Gateway Products (Email, HTTP Proxy etc)
may allow the file through unscanned and give it a clean bill of health.
Server side AV software will not be able to discover any code or sample
contained within this ISO file and it will not raise suspicion even if
you know exactly what you are looking for (Which is for example great to
hide your implants or Exfiltration/Pivot Server).
There is a lot more to be said about this bug class, so rather than bore
you with it in this advisory I provide a link to my 2009 blog post
http://blog.zoller.lu/2009/04/case-for-av-bypassesevasions.html
IV. Patch / Advisory
=================
Unfortunately Quickheal has prooven unreliable partner in coordinating
this vulnerability. Latest information is that this bug was fixed in
November 2019. Quickheal has not provided and details on which products
where affected. For enterprise customers I would recommend to reach out
to quickheal
to ensure this is patched and at the same time ask for proper Security
Advisories and notification.
V. Disclosure Timeline
======================
01.10.2019 - Submitted the information
22.11.2019 - Quickheal asks me to keep this informations strictly
confidential until they patched it
"Once the Release is done you will be notified along with
the details of the build having the fix."
09.01.2020 - ask for an update - no reply
14.01.2020 - ask for an update - inform Quickheal that unless there is
an update I will disclose within the next 2 weeks. No reply
18.01.2020 - Send a reminder - no reply.
14.02.2020 - Send a reminder - no reply.
22.02.2020 - Send a reminder
Quickheal replies "
In an earlier communication around November, we had intimated you that
the issue has been addressed. The fix for the archive was released on 28
November, 2019 to Quick Heal users" - No they didn't.
28.02.2020 - You are correct, as we noticed that the communication
around the confirmation of the fix wasn't sent across.
The fix for the issue was rolled out as part of the updates. All Quick
Heal endpoint products integrating scan engine and having VDB (Virus
database) > 28 November, 2019 [15:05:26] will have the fix.
02.03.2020 - Release of this Advisory