CVE-2021-34723

CVSS V2 Medium 6.9 CVSS V3 Medium 6.7
Description
A vulnerability in a specific CLI command that is run on Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to overwrite arbitrary files in the configuration database of an affected device. This vulnerability is due to insufficient validation of specific CLI command parameters. An attacker could exploit this vulnerability by issuing that command with specific parameters. A successful exploit could allow the attacker to overwrite the content of the configuration database and gain root-level access to an affected device.
Overview
  • CVE ID
  • CVE-2021-34723
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-09-23T03:15:18
  • Last Modified Date
  • 2021-09-30T14:27:07
Weakness Enumerations
CWE URL
CWE-668 http://cwe.mitre.org/data/definitions/668.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:cisco:ios_xe:17.3.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asr_1000-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:asr_1023:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios_xe:17.3.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:isr_4321:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4331:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4351:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr_4431:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios_xe:17.3.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:isr1100:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr1100-4g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr1100-4gltegb:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr1100-4gltena:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr1100-6g:-:*:*:*:*:*:*:* 0 OR
cpe:2.3:h:cisco:isr1100-lte:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:ios_xe:17.3.1a:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:csr1000v:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 6.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.4
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 6.7
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 0.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxesdwan-arbfileov-MVOF3ZZn Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-34723
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34723
History
Created Old Value New Value Data Type Notes
2022-05-10 06:52:53 Added to TrackCVE
2022-12-05 11:09:33 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-05 11:09:33 2021-09-23T03:15Z 2021-09-23T03:15:18 CVE Published Date updated
2022-12-05 11:09:33 2021-09-30T14:27:07 CVE Modified Date updated
2022-12-05 11:09:33 Analyzed Vulnerability Status updated