Solved 7-Zip vulnerability


Fabler2

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Deleted .chm, thanks Peter (y)

A Guy
 

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Thanks for this one!
 

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This vulnerability is NOT only affecting 7-ZIP, so if you have other .chm files on your system, they may also be affected.

There is a PowerSHell Script over at Reddit about how to compare all files on your system for possible problems.


Of note are a couple of points.


It's being debated back and forth, but the end result, for now, seems to be that this is a Windows Help file issue, not just a 7-ZIP issue.
 

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This vulnerability is NOT only affecting 7-ZIP, so if you have other .chm files on your system, they may also be affected.

There is a PowerSHell Script over at Reddit about how to compare all files on your system for possible problems.


Of note are a couple of points.


It's being debated back and forth, but the end result, for now, seems to be that this is a Windows Help file issue, not just a 7-ZIP issue.
Yes, this was the last comment on the link I posted but I removed the file anyway.

1650457754743.png
 

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    ACER Nitro AN16-41
    CPU
    AMD Ryzen™ 7 7735HS Processor 3.2Ghz
    Motherboard
    RB Sierra_PEH (FP7)
    Memory
    32 GB DDR5 4800MHz
    Graphics Card(s)
    NVIDIA GeForce RTX 4060 8GB GDDR6
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    16" QHD+ 165Hz 16:10 IPS Technology
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    AMD Ryzen 7 5800H / 3.2 GHz
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    CZ Scala_CAS (FP6)
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    32 GB DDR4 SDRAM 3200 MHz
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    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
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    Realtek Audio. NVIDIA High Definition Audio
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    180 Watt, 19.5 V
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    500 Mbps
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Correct. But my point is that with the script from Reddit you can check all your legacy .CHM files on your system to verify in case any of those are also vulnerable.

Also, do realize that, currently this is a vulnerability that requires local access.
 

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Update 4/20/2022 7:50amPT: The listed 7zip CVE-2022-29072 vulnerability has now been marked as "disputed" in the official listing, and "multiple third parties have reported that no privilege escalation can occur." According to Google Project Zero vulnerability researcher Tavis Ormandy who alerted us to the dispute, this exploit could only occur by editing the registry and possibly other maneuvers (like adding another Local Administrator account). However, the description isn't clear enough to discern the method of attack. We'll keep you updated if the dispute is granted.
 

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Update 4/20/2022 7:50amPT: The listed 7zip CVE-2022-29072 vulnerability has now been marked as "disputed" in the official listing, and "multiple third parties have reported that no privilege escalation can occur." According to Google Project Zero vulnerability researcher Tavis Ormandy who alerted us to the dispute, this exploit could only occur by editing the registry and possibly other maneuvers (like adding another Local Administrator account). However, the description isn't clear enough to discern the method of attack. We'll keep you updated if the dispute is granted.
Until they make their minds up the .chm file is gone. Don't need it.
 

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    AMD Ryzen™ 7 7735HS Processor 3.2Ghz
    Motherboard
    RB Sierra_PEH (FP7)
    Memory
    32 GB DDR5 4800MHz
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    NVIDIA GeForce RTX 4060 8GB GDDR6
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    16" QHD+ 165Hz 16:10 IPS Technology
    Screen Resolution
    1920 X 1200
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    Samsung 990 PRO 2TB
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    330 Watts
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    Lenovo Bluetooth.
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    ACER NITRO
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    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
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    Realtek Audio. NVIDIA High Definition Audio
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    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
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    1920 x 1080 (Full HD)
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    Samsung 970 Evo Plus 2TB NVMe M.2
    PSU
    180 Watt, 19.5 V
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    Lenovo Bluetooth
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    500 Mbps
    Browser
    Edge
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Hi folks

Does anybody actually use .chm files any more. Surely any sensible help documentation these days would use html so you could easily study the documentation in a browser while also running the application you wanted the documentation for. Not only that but it makes better sense as well as you could embed video / audio content as well if required if the product involved complex assembly or special connection instructions e.g some Mobos.

For legacy apps etc there's so many ways to run those safely that to me this thing is really either "Fake News" or of zero importance.

In any case there's nothing on my Windows machines that is of any value to anybody even if they were to break in. All my online shopping etc is done via a decently secured NAS system and on laptops when travelllng I always run Windows either from an external USB device or usually as a VM. I never use any work supplied laptops for home banking etc even though full Internet access is allowed.

Sometimes there's too much paranoia on security for domestic systems these days. Russian, Chinese ad N.Korean hackers aren't interested into breaking into "Mom, Pop, Grandad" computers but want to cause damage to infrastructure, disrupt a countries services, remove money from its banks, crash the Stock market etc etc.

Windows these days if you keep up with the regular updates (on the "standard i.e non insider editions" is perfectly safe for around 99.9999% of its users world wide. Where fraud is reported it's often caused by "Bog standard Scams" that have been around ever since Humans started trading but are easily avoidable with a bit of common sense.

Windows has moved on from XP and W7 days when Windows "Security" was a real joke.

cheers
jimbo
 
Last edited:

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