Detections
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Cisco IOS XE Software ROM Monitor for Industrial Switches Command Injection (cisco-sa-iosxe-romvar-cmd-inj-N56fYbrw)
medium Nessus Plugin ID 148427
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Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, IOS-XE is affected by a command injection vulnerability due to incorrect validations of specific function arguments passed to a boot script when specific ROMMON variables are set. An unauthenticated, physical attacker can exploit this by setting malicious values for a specific ROMMON variable, which can execute unsigned code and bypass the image verification check during the secure boot process of an affected device. To exploit this vulnerability, the attacker would need to have unauthenticated, physical access to the device or obtain privileged access to the root shell on the device.Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvu65039See Also
Plugin Details
Severity: Medium
ID: 148427
File Name: cisco-sa-iosxe-romvar-cmd-inj-N56fYbrw.nasl
Version: 1.8
Type: combined
Family: CISCO
Published: 4/12/2021
Updated: 9/24/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2021-1452
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xe
Required KB Items: Host/Cisco/IOS-XE/Version, Host/Cisco/IOS-XE/Model
Exploit Ease: No known exploits are available
Patch Publication Date: 3/24/2021
Vulnerability Publication Date: 3/24/2021
Reference Information
CVE: CVE-2021-1452