PT-2020-2789 · Cisco · Cisco Ios
Published
2020-06-03
·
Updated
2021-10-26
·
CVE-2020-3208
CVSS v2.0
7.2
High
| Vector | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs) (affected versions not specified)
Description
A vulnerability in the image verification feature of Cisco IOS Software could allow an authenticated, local attacker to boot a malicious software image on an affected device. The vulnerability is due to insufficient access restrictions on the area of code that manages the image verification feature. An attacker could exploit this vulnerability by first authenticating to the targeted device and then logging in to the Virtual Device Server (VDS) of an affected device. The attacker could then, from the VDS shell, disable Cisco IOS Software integrity (image) verification. A successful exploit could allow the attacker to boot a malicious Cisco IOS Software image on the targeted device. To exploit this vulnerability, the attacker must have valid user credentials at privilege level 15.
Recommendations
For Cisco IOS Software for Cisco 809 and 829 Industrial Integrated Services Routers (Industrial ISRs), update to a version that includes the fix for this vulnerability, as released by Cisco.
As a temporary workaround, consider restricting access to the Virtual Device Server (VDS) to minimize the risk of exploitation.
Avoid using privilege level 15 unless necessary, to reduce the attack surface.
Note: There are no workarounds that address this vulnerability, so updating the software is the recommended course of action.
Fix
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Weakness Enumeration
Related Identifiers
Affected Products
Cisco Ios