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Cisco IOx - Application Hosting Environment Path Traversal Vulnerability (CVE-2022-20720)

Moderate
orange-cert-cc published GHSA-4qmq-rfw6-f2x2 Apr 19, 2022

Package

IOx (Cisco)

Affected versions

17.3.3

Patched versions

17.3(5)

Description

Overview

A vulnerability in the Cisco IOx application hosting environment of multiple Cisco platforms could allow an authenticated, remote attacker to read or write arbitrary data on the underlying host operating system.

Impact

This vulnerability exists because a real path check is not performed on the requested data. An attacker could exploit this vulnerability by creating a symbolic link within the deployed application and requesting data using the API.

Details

A successful exploit could allow the attacker to read or execute arbitrary code as root on the underlying host operating system.

Solution

Security patch

Upgrade to patched version (see above).

Workaround

There are no workarounds that address this vulnerability.

References

https://nvd.nist.gov/vuln/detail/CVE-2022-20720
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iox-yuXQ6hFj

Credits

Orange CERT-CC
Cyrille CHATRAS at Orange group

Timeline

Date reported: June 06, 2021
Date fixed: April 13, 2022

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N

CVE ID

CVE-2022-20720

Weaknesses