CVE-2021-34696
Cisco ASR 900/920 Series Aggregation Services Routers ACL Bypassremote Vulnerability
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.
INFO
Published Date :
Sept. 23, 2021, 3:15 a.m.
Last Modified :
Nov. 21, 2024, 6:10 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-34696
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-34696.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-34696 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-34696 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr900acl-UeEyCxkv -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Removed CVSS V3 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N Added CVSS V3.1 Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N -
Initial Analysis by [email protected]
Oct. 05, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr900acl-UeEyCxkv No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr900acl-UeEyCxkv Vendor Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration AND OR *cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 17.3.2 OR 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:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-24sz-m_r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-24tz-m:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-24tz-m_r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-4sz-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-4sz-a_r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-4sz-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920-4sz-d_r:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:asr_920u-12sz-im:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-34696 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-34696
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.13 }} 0.02%
score
0.47801
percentile