Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
High
Attack Vector
Local
0

CVE-2019-1649

Disclosure Date: May 14, 2019 •
CVE-2019-1649 CVSS v3 Base Score: 6.7
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A vulnerability in the logic that handles access control to one of the hardware components in Cisco’s proprietary Secure Boot implementation could allow an authenticated, local attacker to write a modified firmware image to the component. This vulnerability affects multiple Cisco products that support hardware-based Secure Boot functionality. The vulnerability is due to an improper check on the area of code that manages on-premise updates to a Field Programmable Gate Array (FPGA) part of the Secure Boot hardware implementation. An attacker with elevated privileges and access to the underlying operating system that is running on the affected device could exploit this vulnerability by writing a modified firmware image to the FPGA. A successful exploit could either cause the device to become unusable (and require a hardware replacement) or allow tampering with the Secure Boot verification process, which under some circumstances may allow the attacker to install and boot a malicious software image. An attacker will need to fulfill all the following conditions to attempt to exploit this vulnerability: Have privileged administrative access to the device. Be able to access the underlying operating system running on the device; this can be achieved either by using a supported, documented mechanism or by exploiting another vulnerability that would provide an attacker with such access. Develop or have access to a platform-specific exploit. An attacker attempting to exploit this vulnerability across multiple affected platforms would need to research each one of those platforms and then develop a platform-specific exploit. Although the research process could be reused across different platforms, an exploit developed for a given hardware platform is unlikely to work on a different hardware platform.

Add Assessment

No one has assessed this topic. Be the first to add your voice to the community.

CVSS V3 Severity and Metrics
Base Score:
6.7 Medium
Impact Score:
5.9
Exploitability Score:
0.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
High
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Cisco Routers 16.12.1
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • cisco

Products

  • 15454-m-wse-k9 firmware,
  • analog voice network interface modules firmware,
  • asa 5500 firmware,
  • asr 1000 series firmware,
  • asr 1001 firmware 16.0.0,
  • catalyst 9800-40 wireless controller firmware -,
  • catalyst 9800-80 wireless controller firmware -,
  • encs 5100 firmware -,
  • encs 5400 firmware -,
  • firepower 2100 firmware,
  • firepower 4000 firmware,
  • firepower 9000 firmware,
  • ic3000-k9 firmware,
  • industrial security appliances 3000 firmware,
  • integrated services router 4200 firmware,
  • integrated services router 4300 firmware,
  • integrated services router 4400 firmware,
  • integrated services router t1/e1 voice and wan network interface modules firmware,
  • ios,
  • ios xe,
  • ios xr 7.0.1,
  • ios xr 7.1.1,
  • ncs2k-mr-mxp-k9 firmware,
  • nx-os,
  • ons 15454 mstp firmware,
  • sm-x-1t3/e3 firmware -,
  • supervisor a+ firmware,
  • supervisor b+ firmware
Technical Analysis