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CVE-2021-34696

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
23/09/2021
Last modified:
07/11/2023

Description

A vulnerability in the access control list (ACL) programming of Cisco ASR 900 and ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to incorrect programming of hardware when an ACL is configured using a method other than the configuration CLI. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device.

Impact

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

Base Score: 5.80 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

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

Base Score 3.x
5.80
Severity 3.x
MEDIUM
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

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

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* 17.3.2 (including)
cpe:2.3:h:cisco:asr_902:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_903:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_907:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-10sz-pd:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-10sz-pd_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-12cz-a:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-12cz-a_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-12cz-d:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-12cz-d_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-12sz-im:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-12sz-im_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-24sz-im:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-24sz-im_r:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_920-24sz-m:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools