Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-34699

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/09/2021
Last modified:
04/03/2024

Description

A vulnerability in the TrustSec CLI parser of Cisco IOS and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. This vulnerability is due to an improper interaction between the web UI and the CLI parser. An attacker could exploit this vulnerability by requesting a particular CLI command to be run through the web UI. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

Impact

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

Base Score: 7.70 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

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

Base Score 3.x
7.70
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:S/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
6.80
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios:12.2\(6\)i1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy7:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy7a:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(1\)sy10:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(2\)ej:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.0\(2\)ej1:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools