PT-2020-4187 · Cisco · Cisco Ios Xe

Published 2020-09-24 · Updated 2020-11-24 · CVE-2020-3417

Positive Technologies (AI Summary)

CVSS v2.0

7.7

High

Base vector

AV:A/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: Cisco IOS XE Software (affected versions not specified)

Description: A vulnerability in Cisco IOS XE Software could allow an authenticated, local attacker to execute persistent code at boot time and break the chain of trust. This vulnerability is due to incorrect validations by boot scripts when specific ROM monitor (ROMMON) variables are set. An attacker could exploit this vulnerability by installing code to a specific directory in the underlying operating system (OS) and setting a specific ROMMON variable. A successful exploit could allow the attacker to execute persistent code on the underlying OS. To exploit this vulnerability, the attacker would need access to the root shell on the device or have physical access to the device.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

BDU:2020-04609

CVE-2020-3417

Affected Products

Cisco Ios Xe

References · 6

• https://osv.dev/vulnerability/CVE-2020-3417 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3417 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xbace-OnCEbyS · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-04609 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xbace-OnCEbyS · Vendor Advisory
• https://t.me/cvenotify/6101 · Telegram Post