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7.2
HIGH CVSS 2.0
CVE-2021-34708
"Cisco NCS 540 Series Routers and 8000 Series Routers Local Code Execution Vulnerability"
Description

Multiple vulnerabilities in image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. For more information about these vulnerabilities, see the Details section of this advisory.

INFO

Published Date :

Sept. 9, 2021, 5:15 a.m.

Last Modified :

Nov. 21, 2024, 6:11 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2021-34708 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.

ID Vendor Product Action
1 Cisco ios_xr
2 Cisco 8201
3 Cisco 8202
4 Cisco 8101-32fh
5 Cisco 8101-32h
6 Cisco 8102-64h
7 Cisco 8201-32fh
8 Cisco 8800_12-slot
9 Cisco 8800_18-slot
10 Cisco 8800_4-slot
11 Cisco 8800_8-slot
12 Cisco n540-24z8q2c-m
13 Cisco n540-acc-sys
14 Cisco n540-12z20g-sys-a
15 Cisco n540-12z20g-sys-d
16 Cisco n540-24z8q2c-sys
17 Cisco n540-28z4c-sys-a
18 Cisco n540-28z4c-sys-d
19 Cisco n540x-12z16g-sys-a
20 Cisco n540x-12z16g-sys-d
21 Cisco n540x-16z4g8q2c-a
22 Cisco n540x-16z4g8q2c-d
23 Cisco n540x-acc-sys
: Total Affected Vendor : 1 | Products : 23
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
This information is provided by the 3rd party feeds.
  • Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvx38902, CSCvx53064
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-2021-34708.

URL Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-QN9mCzwn Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-QN9mCzwn Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-34708 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-2021-34708 weaknesses.

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-2021-34708 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2021-34708 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-lnt-QN9mCzwn
  • 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:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
    Added CVSS V3.1 Cisco Systems, Inc. AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
  • Initial Analysis by [email protected]

    Sep. 21, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-QN9mCzwn No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lnt-QN9mCzwn Vendor Advisory
    Added CWE NIST CWE-347
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (excluding) 7.3.2 OR cpe:2.3:h:cisco:8101-32fh:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8101-32h:*:*:*:*:*:*:*:* cpe:2.3:h:cisco:8102-64h:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8201:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8201-32fh:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8202:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8800_12-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8800_18-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8800_4-slot:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:8800_8-slot:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (excluding) 7.3.2 *cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions from (including) 7.4.0 up to (excluding) 7.4.1 OR cpe:2.3:h:cisco:n540-12z20g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540-12z20g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540-24z8q2c-m:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540-24z8q2c-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540-28z4c-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540-28z4c-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540-acc-sys:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540x-12z16g-sys-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540x-12z16g-sys-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540x-16z4g8q2c-a:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540x-16z4g8q2c-d:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:n540x-acc-sys:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 09, 2021

    Action Type Old Value New Value
    Changed Description Multiple vulnerabilities in image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. For more information about these vulnerabilities, see the Details section of this advisory. Multiple vulnerabilities in image verification checks of Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for Cisco 8000 Series Routers could allow an authenticated, local attacker to execute arbitrary code on the underlying operating system. For more information about these vulnerabilities, see the Details section of this advisory.
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.7
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 7.2
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.02 }} -0.00%

score

0.04255

percentile