Advisory Details

August 26th, 2020

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

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
BACK TO ADVISORIES