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CVE-2023-20135

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
13/09/2023
Last modified:
25/01/2024

Description

A vulnerability in Cisco IOS XR Software image verification checks could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system.<br /> <br /> This vulnerability is due to a time-of-check, time-of-use (TOCTOU) race condition when an install query regarding an ISO image is performed during an install operation that uses an ISO image. An attacker could exploit this vulnerability by modifying an ISO image and then carrying out install requests in parallel. A successful exploit could allow the attacker to execute arbitrary code on an affected device.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.00 HIGH
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.00
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* 7.5.2 (including) 7.6 (excluding)
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* 7.7 (including) 7.10.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools