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Author Topic: Zyxel Remote Code Execution Vulnerability, yet no new firmware released  (Read 4032 times)

meritez

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #15 on: March 10, 2021, 03:30:40 PM »

Would anyone be able to compare the differences in zhttpd in VMG1312-B10D AAXA8 and any of the VMG1312-B10A sources?
AAXA8 is where Zyxel introduced the new GUI 2.0 on the VMG1312-B10D

anyone purchased a Zyxel from A&A asked for the updated firmware?
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Weaver

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #16 on: March 10, 2021, 11:18:31 PM »

I purchased a VMG 1312-B10A from A&A. Iím running our own Johnsonís custom firmware in it. We could perhaps fix the bug in the sources on github. (See also https://forum.kitz.co.uk/index.php/topic,21545.msg372637.html)
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ejs

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #17 on: March 13, 2021, 06:50:08 PM »

There's no need to assume that the older models are affected. The VMG8924-B10A and VMG1312-B10A contain a httpd binary that is significantly larger than the zhttpd binary found in a VMG1312-B10A firmware and I suspect that the different HTTP daemon programs are substantially different, not merely renamed files.
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tubaman

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #18 on: March 14, 2021, 09:06:31 AM »

There's no need to assume that the older models are affected. The VMG8924-B10A and VMG1312-B10A contain a httpd binary that is significantly larger than the zhttpd binary found in a VMG1312-B10A firmware and I suspect that the different HTTP daemon programs are substantially different, not merely renamed files.
That's good to know but these models are clearly out of support now, having had no firmware updates for two years.
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BT FTTC 80/20 Huawei Cab - Zyxel VMG8924-B10A

Weaver

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #19 on: March 14, 2021, 11:45:08 AM »

Iím glad Iím only using mine in modem-only (Ďbridgeí) mode.
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meritez

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #20 on: April 18, 2021, 02:43:58 PM »

I'm using the January 2021 firmware on my vmg8825, main difference in the changelog is the kernel is now 4.1 instead of 3.4.11
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meritez

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Re: Zyxel Remote Code Execution Vulnerability, yet no new firmware released
« Reply #21 on: April 24, 2021, 09:42:02 PM »

Zyxel are not offering kernel sources until June for these new firmwares?

Currently poking Zyxel for VMG3925-B10B/B10C   V5.13(AAVF.16)C0 released in Dec 2020

edit:
Asked for AAVF16, got AAVF17 instead  :-\
Code: [Select]
Firmware Version        : V5.13(AAVF.17)C0
Bootbase Version        : V1.63 | 07/22/2020 10:47:57
Vendor Name             : Zyxel Communications Corp.
Product Model           : VMG3925-B10C
« Last Edit: April 26, 2021, 05:12:05 PM by meritez »
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SE

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Any update on this?
XMG3927-B50A

On the site they point to old fw, not June 21  :'(
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meritez

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Any update on this?
XMG3927-B50A

On the site they point to old fw, not June 21  :'(

if you buy direct from a zyxel reseller, you can get the up to date firmware, as re0 and adslmax have done.
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SE

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if you buy direct from a zyxel reseller, you can get the up to date firmware, as re0 and adslmax have done.
I got it from the zyxel amazon store
Would I just email and ask?
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meritez

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I got it from the zyxel amazon store
Would I just email and ask?

If you email support@zyxel.com they should just give you the new firmware.
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SE

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If you email support@zyxel.com they should just give you the new firmware.
Thank you meritez

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meritez

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New firmware for protection against FragAttacks is due in Q3 2021:
https://www.zyxel.com/support/FragAttacks_against_WiFi_products.shtml
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hushcoden

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Was any of the owners of the XMG3927-B50A retail version able to get the latest official firmware from Zyxel and willing to share it?
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meritez

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Was any of the owners of the XMG3927-B50A retail version able to get the latest official firmware from Zyxel and willing to share it?

@adslmax and @re0 have the latest version, not sure if @smallal does as well.
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