Microhard Bullet-LTE Basic Authorization Header Stack-based Buffer Overflow Remote Code Execution Vulnerability

August 26th, 2020
ZDI-20-1206 ZDI-CAN-10596

CVE ID

CVE-2020-17407

CVSS Score

9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Microhard

Affected Products

Bullet-LTE

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microhard Bullet-LTE. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of authentication headers. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.

Additional Details

Fixed in R112


Disclosure Timeline

  • 2020-03-03 - Vulnerability reported to vendor
  • 2020-08-26 - Coordinated public release of advisory
  • 2020-09-17 - Advisory Updated

Credit

Ricky "HeadlessZeke" Lawshae

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